Pre-Grant Publication Number: 20090100041
Track the progress of public participation in the review of this pending patent application, and view
application details. The menu on the right will help you navigate this patent application. Subscribe to
the community enables you to receive updates on this application via email so that you can easly follow recent activity.
LATEST PRIOR ART
DISCUSSION
Mark Kantrowitz (almost 3 years ago)
I recall that in the mid-90s someone had a clever solution to the trusted server problem for timestamping documents. Rather than have the trusted server provide a timestamp for the encrypted hash of the document, it combined the encrypted hash, the timestamp for the document, and the authenticated encrypted hash/timestamp for the previous document for which a timestamp had been provided, and then encrypted and signed (with public key encryption), the result. This yielded a chain of timestamp validations, so the trusted server could not modify the timestamp associated with a document without disturbing subsequent timestamps, thereby eliminating the need for the trusted server to be trusted. I am having trouble locating a patent or paper about this technology. PEER TO PATENT ACTIVITY
All
Discuss Patent Applications
2 comments posted
Size of Community: 3
2 comments posted
Size of Community: 3
Upload + Explain Prior Art
2 submitted
2 submitted
Research Prior Art
0 research notes
0 research notes
Annotate and Evaluate Prior Art
0 prior art ratings
2 citations
0 prior art ratings
2 citations
WHAT IS THIS APPLICATION ABOUT
