> Does anyone have any idea where I might learn about this algorithm - or > indeed any algorithm which does the job.
Just as Perry mentioned, look into Shamir Secret Sharing. There are also implementations of this, see for example http://www.astro.gla.ac.uk/users/norman/distrib/tontine.html (I'm not certain if I ever used that one in particular, so I don't know if it's good, but I'll let you do the research...). --Anton --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]
