Hi Travis, On Thu, Jan 20, 2011 at 2:44 AM, <[email protected]> wrote: > > The simple answer seems to be encryption, which can operate without > adding any metadata, but there's a catch; the symbol file format > expects the values to be symbols - not arbitrary octets. > > So, we have a non-uniform input space - let's say printable characters.
You might be interested in format-preserving encryption (FPE). The latest FPE construction is the FFX mode of operation - encumbered by patent claims: http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/ffx/ffx-spec.pdf Ciao, alfonso -- Alfonso De Gregorio, blogs at http://Plaintext.crypto.lo.gy/ "The real voyage of discovery consists not in seeking new landscapes but in having new eyes.", Marcel Proust _______________________________________________ cryptography mailing list [email protected] http://lists.randombit.net/mailman/listinfo/cryptography
