On Thu, Nov 12, 2015 at 11:13:32AM +0100, Jeff Burdges wrote: > On Wed, 2015-11-11 at 19:06 -0500, Ian Goldberg wrote: > > What Sphinx needs from Lioness is a "large block" block cipher. You > > can > > implement that however you like, but Lioness was a straightforward > > construction. > > Ahh, these large block cyphers are relatively rare I take it. There > are plenty of block cyphers where the forward and reverse directions > might not both be secure, right? I'd imagine these should be avoided.
I'm not sure I follow. Can you give an example of a block cipher where one direction is secure, but the reverse is not? Wouldn't that be more of a trapdoor one-way function (i.e. a public key primitive)? _______________________________________________ Messaging mailing list [email protected] https://moderncrypto.org/mailman/listinfo/messaging
