----- Forwarded message from Zooko Wilcox-O'Hearn <zo...@zooko.com> -----
From: Zooko Wilcox-O'Hearn <zo...@zooko.com> Date: Wed, 11 Jul 2012 15:08:33 -0300 To: Tahoe-LAFS development <tahoe-...@tahoe-lafs.org> Subject: Re: [tahoe-dev] “On the limits of the use cases for authenticated encryption” Reply-To: Tahoe-LAFS development <tahoe-...@tahoe-lafs.org> I've been thinking about this more, including re-reading BenL's post to tahoe-dev. I was inspired by hearing that Tahoe-LAFS's use case had been discussed at the recent "Directions in Authenticated Ciphers" workshop: http://hyperelliptic.org/DIAC/ I've decided that I wasn't really on the right track to say "Authenticated Encryption is useless for Tahoe-LAFS use cases", and instead I should say "We need *public key* Authenticated Encryption instead of *symmetric key* Authenticated Encryption for Tahoe-LAFS use cases". • symmetric-key Authenticated Encryption = Message Authentication Code + cipher • "signcryption" = digital signature + public key encryption • Tahoe-LAFS mutable = digital signature + cipher • Tahoe-LAFS immutable = data identified by its secure hash + cipher Regards, Zooko _______________________________________________ tahoe-dev mailing list tahoe-...@tahoe-lafs.org https://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE _______________________________________________ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography