Cryptography – Particular algorithmic function encoding – Public key
Reexamination Certificate
2005-03-29
2005-03-29
Caldwell, Andrew (Department: 2137)
Cryptography
Particular algorithmic function encoding
Public key
C380S001000, C380S028000, C380S277000, C380S286000, C713S180000, C713S181000, C713S189000, C713S193000, C713S194000, C713S152000, C713S152000
Reexamination Certificate
active
06873706
ABSTRACT:
To provide a secure cryptographic device such as an IC card which can endure TA (Timing Attack), DPA (Differential Power Analysis), SPA (Simple Power Analysis), or the like as an attaching method of presuming secret information held therein, when the secret information held in the card or another information which is used in the secret information or an arithmetic operation using such secret information when such an arithmetic operation is performed is shown by a plurality of expressing methods and the arithmetic operation is performed, thereby making an arithmetic operation processing method different each time the arithmetic operation is performed and making each of an arithmetic operation time, an intensity of a generated electromagnetic wave, and a current consumption different.
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Fukuzawa Yasuko
Miyazaki Kunihiko
Takaragi Kazuo
Caldwell Andrew
Mattingly, Stanger, Malur & Brundridge, P.C.
Nguyen Minh Dieu
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