zooko wrote: > following-up to my own post: > > On Mar 17, 2008, at 7:22 PM, zooko wrote: > >> it >> appears to me that the idea of encrypting the actual data with a hash >> of the plaintext was proposed in the previous message, by Lee Daniel >> Crocker: >> >> http://marc.info/?l=freenet-dev&m=97941517231034&w=2 > > Oh, and then I happened upon this note in the cypherpunks mailing list, > 1996-02-23, in which Bill Stewart replies to John Perritt's suggestion > to use the secure hash of the plaintext as the symmetric encryption key: > > http://cypherpunks.venona.com/date/1996/02/msg02013.html
Yeah, that is definitely the same idea. I guess the only difference is that we specifically did it to make sure that like documents produced like cyphertext in order to save storage space like in the patent, while John Pettitt seems to suggest it just for fun. I'm not sure if intention matters. Note that in the top part of the quote, he suggests encrypting the (hash derived) keys with customer specific keys later, which (if I understood it correct) seems to cover the second part of the MS "invention". // oskar _______________________________________________ p2p-hackers mailing list [email protected] http://lists.zooko.com/mailman/listinfo/p2p-hackers
