tahoe-lafs/trac-2024-07-25
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try breaking it down 

[Imported from Trac: page Security, version 3]
zooko 2007-10-15 22:23:48 +00:00
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Security.md

@ -6,7 +6,17 @@ This page exists so that there is one page to read to learn about the security g
## Access Control
The Tahoe distributed filesystem is composed of files and directories. Each file has a unique and unguessable identifier, called a "CHK-URI". Possession of this identifier is necessary and sufficient to download, reconstruct, decrypt, and verify the integrity of the file. If a person is not given the CHK-URI, then they cannot see the
The Tahoe distributed filesystem is composed of files and directories.
### Files
#### read access
Each file has a unique and unguessable identifier, called a "CHK-URI", which is derived from the file contents. Possession of this identifier is necessary and sufficient to download, reconstruct, decrypt, and verify the integrity of the file. If a person is not given the CHK-URI, then they cannot see the contents of the file.
#### mutation
Files in the Tahoe grid are immutable. If you upload a file to the grid, and then change part of it and upload it again, then there are now two files in the grid -- the old one and the new one -- and each has a distinct, unique, CHK-URI.
## Traffic Analysis