Tarsnap

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Tarsnap
Tarsnap-logo.png
Original author(s)Colin Percival
Developer(s)Colin Percival
Initial release25 April 2008; 11 years ago (2008-04-25)[1]
Stable release
1.0.39 / 29 July 2017; 21 months ago (2017-07-29)
Written inC
Operating systemUnix-like
PlatformCross-platform[2]
Size615.7 kB
TypeOnline backup service
LicenseProprietary
Websitewww.tarsnap.com
As ofJanuary 2016

Tarsnap is a secure online backup service for UNIX-like operating systems, including BSD, Linux, and OS X. It was created in 2008 by Colin Percival. Tarsnap encrypts data, and then stores it on Amazon S3.

Service[edit]

The service is designed for efficiency, only uploading and storing data that has directly changed since the last backup.[3] Its security keys are known only to the user.[4]

It was developed and debugged, with input solicited from bug bounty hunters, to try to find vulnerabilities.[5] An inadvertent yet serious nonce-reuse vulnerability was found by this process and fixed in 2011.[6]

The document of the presentation "From bsdtar to tarsnap"[7] by Percival from EuroBSD-Con 2013 contains "all kinds of detail on exactly how the algorithms work, how deduplication is managed ... the innards of how Tarsnap works"[8]

See also[edit]

References[edit]

  1. ^ "Old Tarsnap releases". Tarsnap. 20 August 2015. Retrieved 4 January 2016.
  2. ^ Percival, Colin. "Tarsnap Download Page". Tarsnap. Retrieved 23 November 2017.
  3. ^ Fabbro, Andrew (August 2012). "Tarsnap: Online Backups for the Truly Paranoid". Linux Journal: 104–113. Retrieved August 21, 2012.
  4. ^ Dragani, Rachelle (May 17, 2012). "Dropbox Security System Doesn't Lock Down Files, Says FTC Complaint". E-Commerce Times/Technewsworld.com. Retrieved August 21, 2012.
  5. ^ Pauli, Darren (May 18, 2012). "AusCERT2012: FreeBSD talks amateur bug hunting". SC Magazine. Australia. Retrieved August 21, 2012.
  6. ^ Edge, Jake (January 19, 2011). "Tarsnap advisory provides a few lessons". LWN.net. Retrieved August 21, 2012.
  7. ^ Percival, Colin. "From bsdtar to tarsnap - Building an online backup service" (PDF). www.tarsnap.com. Tarsnap Backup Inc. Retrieved 6 November 2015.
  8. ^ Lucas, Michael W (2015). Tarsnap Mastery - Online Backup for the Truly Paranoid (1st ed.). Grosse Pointe Woods, Michigan: Tilted Windmill Press https://www.tiltedwindmillpress.com/?product=tarsnap-mastery-online-backups-for-the-truly-paranoid. p. 32. ISBN 978-0692400203. Retrieved 6 November 2015. External link in |publisher= (help)

External links[edit]