Method and apparatus for public key cryptosystem

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20030163701A1
SERIAL NO

10376651

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Abstract

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A method for operating a cryptosystem having a user, a registration station, and an authentication station is disclosed. The user has been assigned an active key pair. The active key pair includes a private key and a public key. The method includes generating an at least one new security key for the user upon receiving a request to generate the at least one new security key. The generated new security key is stored in a storage area without activating the new security key, the new security key being stored as an auxiliary key for the user. A request to activate the new security key that is stored in the storage area is received from the user. The new security key for the user is activated after receiving the activation request from the user.

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Patent Owner(s)

Patent OwnerAddress
HITACHI LTD6-6 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008280 ?1008280

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ochi, Yasushi Yokohama, JP 61 898
Tsuchiya, Hiroyoshi Yokosuka, JP 24 647

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