Eric Hollander writes:
I have thought of another service, like the depository, which might be useful to the user community: a time stamping notary service. This would have less security problems than the depository and would also be neccessary if RSA'ed documents are to replace contracts and other paper documents used in business.
Bellcore is offering some form of this service, or plans to. Stuart Haber, one of the codevelopers, described this at last year's Hackers Conference and presented a paper at the Crypto '90 conference, or possibly the Crypto '91. (I have a Xerox of the paper someplace and may be able to dig it up if you're interested) -- .......................................................................... Timothy C. May | Crypto Anarchy: encryption, digital money, tcmay@netcom.com | anonymous networks, digital pseudonyms, zero 408-688-5409 | knowledge, reputations, information markets, W.A.S.T.E.: Aptos, CA | black markets, collapse of governments. Higher Power: 2^756839 | PGP 2.0 and MailSafe keys by arrangement.