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yourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - WHY IS 1 GB 10^9 BYTES INSTEAD OF 2^30? You're right: If you buy a "1 GB" stick of RAM, it will hold 2 30 bytes of data. However, this is a special case: Unlike everything else in the world of computing, RAM is addressed in hardware. When you're designing a piece of silicon, you want to have N address lines and have every combination of zeroes and ones map to a memory location —to
TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - WHY IS 1 GB 10^9 BYTES INSTEAD OF 2^30? You're right: If you buy a "1 GB" stick of RAM, it will hold 2 30 bytes of data. However, this is a special case: Unlike everything else in the world of computing, RAM is addressed in hardware. When you're designing a piece of silicon, you want to have N address lines and have every combination of zeroes and ones map to a memory location —to
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related to TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - DESIGN
The design of Tarsnap was guided by the following four principles: Security: Backups should be secure against attackers ranging from "script kiddies" up to major world governments, even if they can compromise the systems on which the backups are being stored.Backups are supposed to be a tool for mitigating damage — not a potential vulnerability to worry about! TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - UTILITY
You'll pay less than one cent. Since making money from rounding errors doesn't seem fair, Tarsnap's accounting is performed in attodollars ($10-18) and rounded in the user's favour. Most physical utilities, like electricity, natural gas, and water, have fixed monthly fees for "being hooked up to the grid" in addition to their usage-based fees.TARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP - GENERAL USAGE Tarsnap cache directory. The tarsnap -c and tarsnap -d (archive creating and deleting) operations use a "cache directory" which allows Tarsnap to identify which blocks of data have been previously stored; this directory is specified via the cachedir directive in the Tarsnap configuration file or via the --cachedir option to Tarsnap. TARSNAP - INFRASTRUCTURE The Tarsnap service is built on top of the solid platform provided by Amazon Web Services.Data archived via Tarsnap is stored to the Amazon S3 storage service (the original version, which can survive the loss of 2 datacenters, not the "reduced redundancy" version which can only survive the loss of a single datacenter) before it is acknowledged by the Tarsnap server to Tarsnap clients, so the TARSNAP - DEB PACKAGES If you have not done so already, complete the Initial setup. Install the binary package: sudo apt-get install tarsnap This will also install the tarsnap-archive-keyring package, which allows you to receive updated Tarsnap code and package signing keys. These keys are updated on an annual basis: the code signing key is created in January, while the package signing key is created in the previous TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS.TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - UTILITY
You'll pay less than one cent. Since making money from rounding errors doesn't seem fair, Tarsnap's accounting is performed in attodollars ($10-18) and rounded in the user's favour. Most physical utilities, like electricity, natural gas, and water, have fixed monthly fees for "being hooked up to the grid" in addition to their usage-based fees. TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - SECURITY
Why the Tarsnap online backup service is so secure TARSNAP - INFRASTRUCTURE The Tarsnap service is built on top of the solid platform provided by Amazon Web Services.Data archived via Tarsnap is stored to the Amazon S3 storage service (the original version, which can survive the loss of 2 datacenters, not the "reduced redundancy" version which can only survive the loss of a single datacenter) before it is acknowledged by the Tarsnap server to Tarsnap clients, so theTARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP - CREATE AN ACCOUNT Create a Tarsnap account. Email address: Password: Verify password: Resident of Canada? I am a Canadian resident. I am not a Canadian resident. I agree to TARSNAP - DEB PACKAGES If you have not done so already, complete the Initial setup. Install the binary package: sudo apt-get install tarsnap This will also install the tarsnap-archive-keyring package, which allows you to receive updated Tarsnap code and package signing keys. These keys are updated on an annual basis: the code signing key is created in January, while the package signing key is created in the previous TARSNAP - THE SCRYPT KEY DERIVATION FUNCTION AND The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.. We estimate that on modern (2009) hardware, if 5 seconds are spent computing a derived key, the cost of a hardware brute-force attack against scrypt is roughly TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - CRYPTOGRAPHY Tarsnap cryptography. When a system is first registered with the Tarsnap server, the tarsnap-keygen utility generates cryptographic keys for the system to use. These keys form the backbone of Tarsnap's security: Without them, it is (given the current state of the art of cryptography) infeasible for anyone to either decrypt or createarchives
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS.TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - UTILITY
You'll pay less than one cent. Since making money from rounding errors doesn't seem fair, Tarsnap's accounting is performed in attodollars ($10-18) and rounded in the user's favour. Most physical utilities, like electricity, natural gas, and water, have fixed monthly fees for "being hooked up to the grid" in addition to their usage-based fees. TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - SECURITY
Why the Tarsnap online backup service is so secure TARSNAP - INFRASTRUCTURE The Tarsnap service is built on top of the solid platform provided by Amazon Web Services.Data archived via Tarsnap is stored to the Amazon S3 storage service (the original version, which can survive the loss of 2 datacenters, not the "reduced redundancy" version which can only survive the loss of a single datacenter) before it is acknowledged by the Tarsnap server to Tarsnap clients, so theTARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP - CREATE AN ACCOUNT Create a Tarsnap account. Email address: Password: Verify password: Resident of Canada? I am a Canadian resident. I am not a Canadian resident. I agree to TARSNAP - DEB PACKAGES If you have not done so already, complete the Initial setup. Install the binary package: sudo apt-get install tarsnap This will also install the tarsnap-archive-keyring package, which allows you to receive updated Tarsnap code and package signing keys. These keys are updated on an annual basis: the code signing key is created in January, while the package signing key is created in the previous TARSNAP - THE SCRYPT KEY DERIVATION FUNCTION AND The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.. We estimate that on modern (2009) hardware, if 5 seconds are spent computing a derived key, the cost of a hardware brute-force attack against scrypt is roughly TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related toTARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009. TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz.TARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again. TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previously TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - UTILITY
You'll pay less than one cent. Since making money from rounding errors doesn't seem fair, Tarsnap's accounting is performed in attodollars ($10-18) and rounded in the user's favour. Most physical utilities, like electricity, natural gas, and water, have fixed monthly fees for "being hooked up to the grid" in addition to their usage-based fees.TARSNAP - SECURITY
Why the Tarsnap online backup service is so secure TARSNAP - SIMPLE USAGE Step 1B: Automatic backups (optional) Add this to your crontab : 15 2 * * * /root/tarsnap-backup.sh. This sets up a daily backup task, but note: The time shown above is generated randomly each time this page loads. Please do not use the same time on large numbers of systems, in TARSNAP - INFRASTRUCTURE The Tarsnap service is built on top of the solid platform provided by Amazon Web Services.Data archived via Tarsnap is stored to the Amazon S3 storage service (the original version, which can survive the loss of 2 datacenters, not the "reduced redundancy" version which can only survive the loss of a single datacenter) before it is acknowledged by the Tarsnap server to Tarsnap clients, so theTARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP ACCOUNT MANAGEMENT LOGIN Navigation menu. Tarsnap account management login. Email address:Password:
TARSNAP - CREATE AN ACCOUNT Create a Tarsnap account. Email address: Password: Verify password: Resident of Canada? I am a Canadian resident. I am not a Canadian resident. I agree to TARSNAP - THE SCRYPT KEY DERIVATION FUNCTION AND The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.. We estimate that on modern (2009) hardware, if 5 seconds are spent computing a derived key, the cost of a hardware brute-force attack against scrypt is roughly TARSNAP - DEB PACKAGES If you have not done so already, complete the Initial setup. Install the binary package: sudo apt-get install tarsnap This will also install the tarsnap-archive-keyring package, which allows you to receive updated Tarsnap code and package signing keys. These keys are updated on an annual basis: the code signing key is created in January, while the package signing key is created in the previous TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related to TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - DESIGN
The design of Tarsnap was guided by the following four principles: Security: Backups should be secure against attackers ranging from "script kiddies" up to major world governments, even if they can compromise the systems on which the backups are being stored.Backups are supposed to be a tool for mitigating damage — not a potential vulnerability to worry about! TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previouslyTARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS. TARSNAP - ONLINE BACKUPS FOR THE TRULY PARANOIDTARSNAPDESIGNDOWNLOADDOCUMENTATIONTECHNICAL DETAILSOPEN SOURCE Tarsnap is a secure, efficient online backup service: Encryption: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! Source code: the client code is available. You don't need to trust us; you can check the encryptionyourself!
TARSNAP - GETTING STARTED Getting started with Tarsnap. There are 6 steps before you can begin your first backup with Tarsnap: 1. Install the Tarsnap client code. Follow the instructions on the Tarsnap client code download page . You may predict how much it will cost to store your data in Tarsnap beforeyou sign up . 2.
TARSNAP - DOWNLOAD
There are two methods of getting Tarsnap: Use one of our deb packages, either as a pre-compiled binary, or compiling the source package. This is the recommended method. Compile the generic source code, without any packaging tools. This method is likely of interest to "truly paranoid" users who want to manually verify all checksums, read the source code carefully (at least the parts related to TARSNAP - DOCUMENTATION Tarsnap documentation. If you're new to Tarsnap, you probably want to read the documentation on getting started with Tarsnap , Tarsnap simple usage, and Tarsnap general usage . There are a number of tips which can improve your Tarsnap experience. For more advanced users,the
TARSNAP - DESIGN
The design of Tarsnap was guided by the following four principles: Security: Backups should be secure against attackers ranging from "script kiddies" up to major world governments, even if they can compromise the systems on which the backups are being stored.Backups are supposed to be a tool for mitigating damage — not a potential vulnerability to worry about! TARSNAP - OPEN SOURCE Open Source Code Contributions. While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license: The scrypt key derivation function. The kivaloo data store. The spiped secure pipe daemon. In addition to these, Tarsnap uses open sourcecode and
TARSNAP - COMPILING
Linux and macOS: shasum -a 256 tarsnap-autoconf-1.0.39.tgz. FreeBSD: sha256 tarsnap-autoconf-1.0.39.tgz. In either case, the displayed hash should match the one you saw in the gpg --decrypt command. 3. Compile the software. Extract the file and change into that directory. tar -xzf tarsnap-autoconf-1.0.39.tgz. TARSNAP - EFFICIENCY Tarsnap - Efficiency. When creating archives, Tarsnap takes streams of archive data and splits them into variable-length blocks; these blocks are compared, and any duplicate blocks are removed (i.e., the data is "de-duplicated") before being uploaded to the Tarsnap server. Tarsnap keeps a local cache telling it what blocks have been previouslyTARSNAP - SUPPORT
There are four places to get help, ranging from the fastest (but least likely to have the necessary answers) to the most comprehensive (but slowest): The Tarsnap documentation , especially the general usage guide and the Frequently Asked Questions . The #tarsnap IRC channel on EFnet. The Tarsnap mailing lists, especially the tarsnap-users list. TARSNAP - FREQUENTLY ASKED QUESTIONS Tarsnap doesn't care about the physical hardware; only the data, key file, and cache directory that it is given to work with. To confirm that everything is set up, we recommend that after you have copied your data to the new system: Create an archive on the old system with: tarsnap -c --print-stats MY_OPTIONS.TARSNAP - ABOUT
About Tarsnap and Dr. Colin Percival. Work on Tarsnap began in September 2006 when the author, Dr. Colin Percival, decided that he wanted a better online backup service than was presently available. After slightly more than two years of development and private beta testing, Tarsnap officially entered public beta in November 2008, and attained profitability in February 2009.TARSNAP - DESIGN
The design of Tarsnap was guided by the following four principles: Security: Backups should be secure against attackers ranging from "script kiddies" up to major world governments, even if they can compromise the systems on which the backups are being stored.Backups are supposed to be a tool for mitigating damage — not a potential vulnerability to worry about! TARSNAP - INFRASTRUCTURE The Tarsnap service is built on top of the solid platform provided by Amazon Web Services.Data archived via Tarsnap is stored to the Amazon S3 storage service (the original version, which can survive the loss of 2 datacenters, not the "reduced redundancy" version which can only survive the loss of a single datacenter) before it is acknowledged by the Tarsnap server to Tarsnap clients, so theTARSNAP - SECURITY
Why the Tarsnap online backup service is so secureTARSNAP - TIPS
Don't apply any compression (gzip, bzip2, zip, tar.gz, etc.) to your data — Tarsnap itself will compress data after it performs deduplication.If you compress a file, it will interfere with deduplication, meaning that if you change that file and re-compress it, Tarsnap will upload (almost) all of that compressed file again.TARSNAP - MAN PAGES
Like all good UNIX software, Tarsnap includes man pages which document its functionality and its myriad options. After installing the Tarsnap client code, the Tarsnap man page is available via man tarsnap; the Tarsnap key generation and management utilities' man pages via man tarsnap-keygen and man tarsnap-keymgmt; and the Tarsnap configuration file's man page is available via man tarsnap.conf. TARSNAP - CREATE AN ACCOUNT Create a Tarsnap account. Email address: Password: Verify password: Resident of Canada? I am a Canadian resident. I am not a Canadian resident. I agree to TARSNAP - THE SCRYPT KEY DERIVATION FUNCTION AND The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.. We estimate that on modern (2009) hardware, if 5 seconds are spent computing a derived key, the cost of a hardware brute-force attack against scrypt is roughly TARSNAP - DEB PACKAGES If you have not done so already, complete the Initial setup. Install the binary package: sudo apt-get install tarsnap This will also install the tarsnap-archive-keyring package, which allows you to receive updated Tarsnap code and package signing keys. These keys are updated on an annual basis: the code signing key is created in January, while the package signing key is created in the previous TARSNAP - WHY IS 1 GB 10^9 BYTES INSTEAD OF 2^30? You're right: If you buy a "1 GB" stick of RAM, it will hold 2 30 bytes of data. However, this is a special case: Unlike everything else in the world of computing, RAM is addressed in hardware. When you're designing a piece of silicon, you want to have N address lines and have every combination of zeroes and ones map to a memory location —to
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ONLINE BACKUPS FOR THE TRULY PARANOID Tarsnap is a secure, efficient online backup service: * ENCRYPTION: your data can only be accessed with your personal keys. We can't access your data even if we wanted to! * SOURCE CODE: the client code is available. You don't need to trust us; you can check the encryption yourself! * DEDUPLICATION: only the unique data between your current files and encrypted archives is uploaded. This reduces the bandwidth and storage required, saving you money! Tarsnap runs on UNIX-like operating systems (BSD, Linux, macOS,Cygwin, etc).
START USING TARSNAP NOW!TARSNAP PRICING
Tarsnap uses a prepaid model based on actual usage:STORAGE:
250 picodollars / byte-month of encoded data($0.25 / GB-month)
BANDWIDTH:
250 picodollars / byte of encoded data($0.25 / GB)
"Encoded data" are the actual bytes stored or transmitted after data deduplication, compression, and encryption. There are no other fees — Tarsnap has no fixed costs or minimummonthly fees.
You pay for what you use, nothing more.WHY USE TARSNAP?
Consider a typical backup scenario: * Alice begins a backup, which takes a complete snapshot of her files. She does not need to decide whether to do a "full backup" or "incremental backup". * Tarsnap automatically finds the unique data within her files. Only this data is uploaded and stored. * Alice pays less than $5/month. Even though she has thousands of daily backups, adding up to several terabytes of non-uniquedata.
* Alice's data is secure. Even if an attacker (Mallory) breaks into Tarsnap's storage, he lacks her private keys and thus cannot read ormodify her data.
LATEST TARSNAP RELEASE TARSNAP 1.0.39 (JULY 29, 2017) Changes in this version compared to 1.0.38: * tarsnap 1.0.38 (but not earlier versions) would exit with an assertion failure after successfully creating an archive containing a file with "last modified" times prior to January 1st, 1970. * tarsnap 1.0.38 and earlier could crash if instructed to archive the contents of corrupt cpio or ar archives (via the @archive directive). * tarsnap 1.0.38 and earlier could crash if passed an invalidlyencrypted key file.
You can see all of the changes between 1.0.38 and this version in our tarsnap git repository . DOWNLOAD TARSNAP NOW!* Tarsnap
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