ANNOUNCING Tahoe, the Least-Authority File System, v1.7.1
The Tahoe-LAFS team is pleased to announce the immediate
availability of version 1.7.1 of Tahoe-LAFS, an extremely
reliable distributed storage system.
Tahoe-LAFS is the first distributed storage system which
offers "provider-independent security"â"meaning that not even
the operators of your storage servers can read or alter your
data without your consent. Here is the one-page explanation of
its unique security and fault-tolerance properties:
Tahoe-LAFS v1.7.1 is the successor to v1.7.0, which was
released June 18, 2010 .
v1.7.1 is a stable minor release which adds several bugfixes
and improvements in security, forward-compatibility,
packaging, usability, and portability. See the NEWS file 
WHAT IS IT GOOD FOR?
With Tahoe-LAFS, you distribute your filesystem across
multiple servers, and even if some of the servers are
compromised by by an attacker, the entire filesystem continues
to work correctly, and continues to preserve your privacy and
security. You can easily share specific files and directories
with other people.
In addition to the core storage system itself, volunteers have
built other projects on top of Tahoe-LAFS and have integrated
Tahoe-LAFS with existing systems.
iPhone, and Android, and plugins for Hadoop, bzr, mercurial,
duplicity, TiddlyWiki, and more. See the Related Projects page
on the wiki .
We believe that strong cryptography, Free and Open Source
Software, erasure coding, and principled engineering practices
make Tahoe-LAFS safer than RAID, removable drive, tape,
on-line backup or "cloud storage" systems.
This software is developed under test-driven development, and
there are no known bugs or security flaws which would
compromise confidentiality or data integrity under recommended
use. (For all currently known issues please see the
known_issues.txt file .)
This release is fully compatible with the version 1 series of
Tahoe-LAFS. Clients from this release can write files and
directories in the format used by clients of all versions back
to v1.0 (which was released March 25, 2008). Clients from this
release can read files and directories produced by clients of
all versions since v1.0. Servers from this release can serve
clients of all versions back to v1.0 and clients from this
release can use servers of all versions back to v1.0.
This is the tenth release in the version 1 series. This series
of Tahoe-LAFS will be actively supported and maintained for
the forseeable future, and future versions of Tahoe-LAFS will
retain the ability to read and write files compatible with
You may use this package under the GNU General Public License,
version 2 or, at your option, any later version. See the file
"COPYING.GPL"  for the terms of the GNU General Public
License, version 2.
You may use this package under the Transitive Grace Period
Public Licence, version 1 or, at your option, any later
version. (The Transitive Grace Period Public Licence has
requirements similar to the GPL except that it allows you to
delay for up to twelve months after you redistribute a derived
work before releasing the source code of your derived work.)
See the file "COPYING.TGPPL.html"  for the terms of the
Transitive Grace Period Public Licence, version 1.
(You may choose to use this package under the terms of either
licence, at your option.)
Tahoe-LAFS works on Linux, Mac OS X, Windows, Cygwin, Solaris,
*BSD, and probably most other systems. Start with
HACKING AND COMMUNITY
Please join us on the mailing list . Patches are gratefully
accepted -- the RoadMap page  shows the next improvements
that we plan to make and CREDITS  lists the names of people
who've contributed to the project. The Dev page  contains
resources for hackers.
Tahoe-LAFS was originally developed by Allmydata, Inc., a
provider of commercial backup services. After discontinuing
funding of Tahoe-LAFS R&D in early 2009, they have continued
to provide servers, bandwidth, small personal gifts as tokens
of appreciation, and bug reports. Thank you to Allmydata,
Inc. for their generous and public-spirited support.
Google, Inc. is sponsoring Tahoe-LAFS development as part of
the Google Summer of Code 2010. Google suggested that we
should apply for the Summer of Code program, and when we did
they generously awarded four sponsorships to students from
around the world to hack on Tahoe-LAFS this summer. Thank you
to Google, Inc. for their generous and public-spirited
If you can find a security flaw in Tahoe-LAFS which is serious
enough that feel compelled to warn our users and issue a fix,
then we will award you with a customized t-shirts with your
exploit printed on it and add you to the "Hack Tahoe-LAFS Hall
Of Fame" .
This is the fifth release of Tahoe-LAFS to be created solely
as a labor of love by volunteers. Thank you very much to the
team of "hackers in the public interest" who make Tahoe-LAFS
David-Sarah Hopwood and Zooko Wilcox-O'Hearn
on behalf of the Tahoe-LAFS team
July 18, 2010
Rainhill, Merseyside, UK and Boulder, Colorado, USA