On Mon, Dec 12, 2005 at 12:20:26AM -0600, Travis H. wrote: > 2) While CTR mode with a random key is sufficient for creating a > permutation of N-bit blocks for a fixed N, is there a general-purpose > way to create a N-bit permutation, where N is a variable? How about > picking a cryptographically strong permutation on N elements, where N > is not necessarily a power of 2?
Use can use the Bear or Lion constructions to form 2^{arbitrary} bit block ciphers quite easily. -Jack --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]