Mutual authentication system

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United States of America Patent

PATENT NO 5225664
SERIAL NO

07648049

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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When mutual authentication is effected between an IC card and a host device, key data and random number data transmitted from the host device are immediately subjected to the encrypting process without storing the same into a RAM of the IC card, and only authentication data obtained as the result of the encrypting process is stored. As a result, the memory area in the RAM can be saved and effectively used.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBA A CORP OF JAPAN72 HORIKAWA-CHO SAIWAI-KU KAWASAKI-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iijima, Yasuo Yokohama, JP 61 1993

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