Patent №
US 7,305,558
Granted
2007-12-04
Filed 2000
Owner
HITACHI, LTD.
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09693713
According to the invention, techniques for authenticating that a digitally signed document is genuine. Specific embodiments according to the present invention can determine whether a digital signature was generated by a digital signature generator, or if the digital signature was generated by a third party posing as the digital signature generator. Specific embodiments can provide independent verification of digital signer identity based upon prior signed messages, time/date stamps, and the like. Techniques according to the present invention can be embodied in methods, apparatus, computer software and systems.
AI classification
Ownership
HITACHI, LTD.
assignment · 112610304
Assignors
MIYAZAKI, KUNIHIKO, SAKAI, RYOICHI, TAKARAGI, KAZUO, SUSAKI, SEIICHI, MORITSU, TOSHIYUKI, SAKAI, MIZUHIRO, IWAMURA, MITSURU, MATSUMOTO, TSUTOMU
On an employer assignment, the assignors are typically the inventors.