Portable information storage medium and its authentication...

Details Portable information storage medium and its authentication... Portable information storage medium and its authentication...

2007-11-27

2007-11-27

Vu, Kim (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S167000, C713S168000, C713S171000, C713S189000, C713S193000, C713S194000, C380S001000, C380S044000, C380S046000, C380S277000

Reexamination Certificate

active

10343888

ABSTRACT:
Authentification data (R) comprising random numbers generated by a reader/writer (200) is given to an IC card (100), encrypted by utilizing a secret key (a), and returned as encryption data (C). This encryption data (C) is decoded by utilizing an open key (β) to authentify the IC card. A set of past given authentification data (R) is stored in an authentification data storage section (130): if another set of given authentification data (R) is the same as the set of past data, an encryption operating section (150) is prevented from executing an illegal statistical analysis technique by repeatedly giving encrypting operation the same set of authentiification data (R).

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Kocher, P. et al., Differential Power Analysis. Lecture Notes in Computer Science. vol. 1666, 1999.08, pp. 388 to 397, Especially 6 Preventing DPA

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