On Saturday, 2009-11-21, at 23:20 , David-Sarah Hopwood wrote: > It is really 128-bit. You can see that by the fact that it generates 16-byte (128-bit) encryption keys here: http://allmydata.org/trac/tahoe/browser/src/allmydata/immutable/ upload.py?rev=4045#L1156 Regards, Zooko