[47632] in Cypherpunks
"Trustworthy" PGP Timestamping Service ??
daemon@ATHENA.MIT.EDU (Matthew Richardson)
Sun Jan 21 13:58:00 1996
From: matthew@itconsult.co.uk (Matthew Richardson)
To: cypherpunks@toad.com
Date: Sun, 21 Jan 1996 18:51:09 GMT
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I have recently setup a free PGP timestamping service which operates
by email.
The objective of the service is to be able to produce "trustworthy"
timestamps which cannot be backdated without detection. It achieves
this by:-
(a) giving every signature a unique sequential serial number;
(b) every day making a ZIP file of that day's detached signatures
and feeding the ZIP file back for signing (and hence the assignment
of another serial number);
(c) making available details of the highest serial number on each
day as well as the signed ZIP files via email (and shortly WWW);
(d) weekly publishing details of the DETACHED signatures of the ZIP
file in alt.security.pgp and to users requesting them on a list
server.
I would be interested in folks comments on this "trustworthiness",
including any weaknesses or possible improvements.
Full details of the service can be found at:-
http://www.itconsult.co.uk/stamper.htm
Thank you in advance.
Best wishes,
Matthew
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