The first decentralized storage system with *provider-independent security*.

Tahoe-LAFS is a system that helps you to store files. You run a client
program on your computer, which talks to one or more storage servers on other
computers. When you tell your client to store a file, it will encrypt that
file, encode it into multiple pieces, then spread those pieces out among
multiple servers. The pieces are all encrypted and protected against
modifications. Later, when you ask your client to retrieve the file, it will
find the necessary pieces, make sure they haven't been corrupted, reassemble
them, and decrypt the result.


What is "provider-independent security"?

Every seller of cloud storage services will tell you that their service is
"secure".  But what they mean by that is something fundamentally different
from what we mean.  What they mean by "secure" is that after you've given
them the power to read and modify your data, they try really hard not to let
this power be abused.  This turns out to be difficult!  Bugs,
misconfigurations, or operator error can accidentally expose your data to
another customer or to the public, or can corrupt your data.  Criminals
routinely gain illicit access to corporate servers.  Even more insidious is
the fact that the employees themselves sometimes violate customer privacy out
of carelessness, avarice, or mere curiosity.  The most conscientious of
these service providers spend considerable effort and expense trying to
mitigate these risks.

This is what we call *provider-independent security* - *The service provider
never has the ability to read or modify your data in the first place: never.*
If you use Tahoe-LAFS, then all of the threats described above are non-issues
to you.  Not only is it easy and inexpensive for the service provider to
maintain the security of your data, but in fact they couldn't violate its
security if they tried. 


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