From: "Charles M. Hannum" <[EMAIL PROTECTED]> > I can name at least one obvious case where "sensitive" data -- namely credit > card numbers -- is in fact something you want to search on: credit card > billing companies like CCbill and iBill. Without the ability to search by > CC#, customers are pretty screwed.
Is there a good reason for not searching by the hash of a CC# ? http://www.wayner.org/books/td/ http://www.unixwiz.net/techtips/secure-cc.html I think the author is planning further work on this site and would be happy to receive constructive comments. --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]