Countermeasure method in an electronic component using a...

Details Countermeasure method in an electronic component using a... Countermeasure method in an electronic component using a...

2007-04-17

2007-04-17

Barrón, Jr., Gilberto (Department: 2132)

Cryptography

Key management

Having particular key generator

C380S030000, C380S037000

Reexamination Certificate

active

09959944

ABSTRACT:
A countermeasure method in a first electronic component communicating with a second electronic component uses a secret key K[0] cryptographic algorithm A of size k. The countermeasure implementation employs a systematic and regular evolution of K[i] by a function K[i]=f(k[i−1]), and transmission of i to the second component. A computational shortcut enables the second component to compute K[i] from K[0] without having to generate the i−1 keys K[1] to K[i−1] separating K[0] and K[i].

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