Changes between Version 2 and Version 3 of Security

Timestamp:

2007-10-15T22:23:48Z (17 years ago)

Author:

zooko

Comment:

try breaking it down

Security

@@ -7 +7 @@
 == 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 ==