I ran across this web page: http://www.da.com/swp.htm. They claim their 'Cyber-stone' scheme uses a "Pseudo-random Transposition Cipher" to vary the keys for an underlying symmetric cipher for each message. They also claim to have a patent on changing the keys for each message (which seems like something on the level of patenting the 'help' key on a keyboard, or the blinking block cursor. Sigh). I ask if it's snake oil because of the use of non-standard terminology and marketing bullstuff like "A New Way of Encrypting". However neither of those are anywhere near proof of uselessness, only an indication that's "food for thought and grounds for further research". They claim patents: 5,307,412, "Random Coding Cipher System and Method" 5,335,280, "Random Sum Cipher System and Method" 5,533,128, "Pseudo-Random Transposition Cipher System and Method" -- Eric Murray ericm@lne.com Network security and encryption consulting. PGP keyid:E03F65E5 fingerprint:50 B0 A2 4C 7D 86 FC 03 92 E8 AC E6 7E 27 29 AF