Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reissue Patent
2007-05-08
2007-05-08
Darrow, Justin T. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S168000, C713S170000, C713S171000, C380S283000
Reissue Patent
active
10138355
ABSTRACT:
In authentication using a plurality of cipher keys, the authentication time is shortened. In the case that an encipher key to encipher key are required to take an access to each area out of the area to area in a memory of an IC card, a plurality of areas to have an access is informed to the IC card from a reader writer, a plurality of cipher keys corresponding to these areas (for example, cipher key1,cipher key2,and cipher key4) is read out, and reduction processing section generates one reduction key from these cipher keys. A random number which is generated from a random number generation section of the reader writer is transferred to the IC card, and an encipherment section enciphers the random number using the reduction key. The reader writer receives the enciphered random number from the IC card, and deciphers it using the reduction key, and judges the IC card to be proper if the deciphered random number is equal to the generated random number.
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Ishibashi Yoshihito
Kusakabe Susumu
Takada Masayuki
Bell Boyd & Lloyd LLC
Darrow Justin T.
Sony Corporation
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