[6747] in cryptography@c2.net mail archive
Re: time dependant
daemon@ATHENA.MIT.EDU (Zulfikar A Ramzan)
Wed Mar 8 00:21:45 2000
Message-Id: <200003080519.AAA17073@w20-575-14.mit.edu>
To: cryptography@c2.net
Date: Wed, 08 Mar 2000 00:19:31 -0500
From: Zulfikar A Ramzan <zulfikar@MIT.EDU>
One nice number-theoretic approach to the problem of preventing someone
(including the original sender) from decrypting a message before a
certain amount of time elapses can be found in the paper:
Time-lock puzzles and timed-release Crypto
by Ronald L. Rivest, Adi Shamir, and David A. Wagner.
which is avaialable from:
http://theory.lcs.mit.edu/~rivest/publications.html
The difficulty with this problem, in general, is that the notions of
cpu time and real time don't often coincide.
Hope this help,
Zulfikar.
