'E-postmark' gives stamp of approval

[Sean Smith]

Back when I first heard about this idea (a long time ago),
I wondered two things:

1. What about  Haber and Stornetta's work (and patents)?

2. What's to stop me from setting up "Sean's Discount Postmark Service,"
where, each time unit, I collect document hashes from customers,
build a hash tree, and buy a USPS postmark for the root of the tree?

--Sean












-- 
Sean W. Smith, Ph.D.                         sws at cs.dartmouth.edu   
http://www.cs.dartmouth.edu/~sws/       (has ssl link to pgp key)
Department of Computer Science, Dartmouth College, Hanover NH USA




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