[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Quick ping about Surety Technologies
--- begin forwarded text
Date: Tue, 8 Dec 1998 00:17:17 -0500 (EST)
To: [email protected]
Subject: Re: Quick ping about Surety Technologies
> *That*'s interesting. Haven't heard it before. If you want, I'll bounce it
If you would, that would be interesting. The patent info on their web
Method for secure timestamping of digital documents.
U.S. Patent No. 5,136,647, issued August 4, 1992.
U.S. Patent Re. 34,954, reissued May 30, 1995.
The initial patent issue covers a variety of fundamental
technology and algorithmic components of digital
timestamping. More specifically, the claims cover:
* Any use of an outside party's digital signature to timestamp
* The "hash-and-sign" method in which the outside party receives
the one-way hash of the document to be timestamped.
I distrust software patents, but even that aside, these sound really
broad to me. More info at <http://www.surety.com/patent_overview.html>.
--- end forwarded text
Robert A. Hettinga <mailto: [email protected]>
Philodox Financial Technology Evangelism <http://www.philodox.com/>
44 Farquhar Street, Boston, MA 02131 USA
"... however it may deserve respect for its usefulness and antiquity,
[predicting the end of the world] has not been found agreeable to
experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'