Patent ID: 8681972
Filing Date: 2014-03-25
Classification: H04L

Abstract:
1. A method, comprising: executing a cryptographic calculation in an electronic component, according to a given cryptographic algorithm, the executing including applying a one-way function which is disabled upon an intrusion into the electronic component; said one-way function being based on a first affine operation which corresponds to a first secret key; said executing including the following steps relating to applying said one-way function: (a) obtaining first and second random values; (b) obtaining a first result by applying a second affine operation, which corresponds to a second secret key, to a first combination of the first and second random values; (c) obtaining a second result by applying a third affine operation, which corresponds to a third secret key, to said first result; wherein a combination of the third and second affine operations corresponds to the first affine operation; and applying a cryptographic operation to at least one of said second result and a second combination of the first and second random values.