On Sat, Mar 25, 2000 at 02:35:05AM -0500, Marcel Popescu wrote:
> Does anybody know of a public document explaining the cipher modes (CBC,
> CFB, and so on) to laymen? I would like to know the pros and cons.
Schnieier's Applied Crypto covers it, as does Menezes Van Oorschot et. al
Handbook of Applied Cryprography.
> More specifically, what mode should I use for 3DES in Yarrow? [The Yarrow
> paper doesn't specify it.]
Three-key outer CBC is strongest but slower.
Inner CBC lets you run the single DESs in parallel. But if you're
doing it in software on single CPU computers and common
OSs there's not much advantage to running the DESs in parallel.
--
Eric Murray www.lne.com/~ericm ericm at the site lne.com PGP keyid:E03F65E5
