The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2001
Filed:
Jan. 26, 1998
Applicant:
Inventors:
Kazue Sako, Tokyo, JP;
Hiroshi Miyauchi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/02 ;
U.S. Cl.
CPC ...
H04L 9/02 ;
Abstract
An encryption key processing system includes a user terminal system which uses a key and a sub-system for holding information regarding the user terminal system, the sub-system generating predetermined public information, secret information corresponding to the public information and a secret key dependent on an identifier of said user terminal system, sending a secret key to the user terminal system in secret and the user terminal system generating and using a key and necessary information based on a secret key and public information received from the sub-system.