"L. Todd Masco" says: > What crypto functions are considered modern and usable? The list I have > right now is: > > RSA > IDEA > DES > 3DES > RC4 > RC5 > BLOWFISH > MD4 > MD5 I wouldn't use BLOWFISH. MD4 is flawed -- and its a hash function, not a crypto function (as is MD5). RC5 is very, very new. RC4 hasn't been well studied in the open literature yet, though it is quite promising. .pm