On Jan 12, 1:21pm, Mark Chen wrote: > Among symmetric ciphers, there's GOST. Using which S-boxes though? Matt posted a set a while ago, although I suspect they were the ones the Soviet public got, and probably not overly secure. Add the latest (91 I think) version LOKI to the list. Only a 64 bit key, but still not bad, reasonably well studied, and free. Ian.