Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-12-26
2006-12-26
Smithers, Matthew (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S270000, C380S272000, C380S273000
Reexamination Certificate
active
07155607
ABSTRACT:
An object of the present invention is to provide a technology to improve security against spoofing in a method of authentication using a challenge and response system.In the method of authentication of the present invention, the piece of challenge data is transmitted from the sever10to the terminal20(S104), and then the piece of response data, which is the decrypted challenge data (S105), is transmitted from the terminal to the server (S107). Further, whether the piece of response data is the piece of challenge data decrypted or not is judged based on encryption performed in the server10(S109). When the result of judgment is affirmative, the parameter used both for encryption and decryption is renewed to a parameter to be used in the next authentication (S111, S112).
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Ohmori Motoji
Tatebayashi Makoto
Yokota Kaoru
Matsushita Electric - Industrial Co., Ltd.
Smithers Matthew
Wenderoth , Lind & Ponack, L.L.P.
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