At 12:58 AM 08/11/2002 -0700, Lucky Green wrote:

BTW, does anybody here know if there is still an email time stamping server in operation? The references that I found to such servers appear to be dead.

The canonical timestamping system was Haber & Stornetta's work at Bellcore, commercialized at Surety.com. The site is current, has some Digital Notary Service and Secure Email things on it, and something much more amazing - it looks like they received $7M in financing in June :-) There's a nice collection of pointers to timestamping systems at http://saturn.tcs.hut.fi/~helger/crypto/link/timestamping/ though I don't know how current the references are - the page was last updated 14.8.2002. The free PGP-based system http://www.itconsult.co.uk/stamper.htm has a news item from 04-Jun-02, which comments that, although they haven't posted any news items in five years, they've been in continuous operation....