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:
Oct. 24, 1989
Filed:
Aug. 24, 1987
Eiji Okamoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A key distribution method and system for distributing a key over an insecure communication channel between first and second systems. Both first and second systems generate respective random numbers, calculate key distribution codes based on that random number, public information and information secret to the respective systems, and transmits the distribution codes to the other system. The same key is generated by both systems based on public information, the locally generated random number and the received key distribution codes. Alternatively, the systems may exclude the secret information from the key distribution codes but generate and transmit identification codes based on the secret information, public information and the locally generated random numbers. The received key distribution and identification codes are subjected to a known transformation and compared to known identification of the transmitting system.