| 摘要 |
The invention relates to a secured comparative processing method of the type in which a processor of an electronic component compares a set of proof data received by the processor as an input with main secret data stored in said electronic component, characterised in that the processor executes, in parallel with the comparison with the secret data, a series of complementary operations on the set of proof data which generate on the electronic component a variation in behaviour which is a function of the proof data which the component receives as an input and which is added to the variation in behaviour linked to the comparison with the main secret data, the series of complementary operations including a series of base operations repeated K times, and the execution of said series being preceded by an adjustment of execution parameters of said series, the parameters including: the identifier of the series of base operations to be executed, the series of base operations being comprised within a set of predefined base operations, and the number K of executions of the set of base operations, the set of adjusted execution parameters being specific to the set of proof data received by the electronic component. |
| 主权项 |
1. A secure comparative processing method of the type in which a processor of an electronic component compares set of test data (EPR, AUTH) which it receives at input to main secret data (CTRL, PIN) stored in said electronic component, characterized in that the processor executes in parallel to comparison to the secret data (CTRL, PIN), a series of complementary operations on the set of test data (EPR, AUTH) which generate on the electronic component a variation in behavior which is a function of the test data (EPR, AUTH) which it receives at input and which is added to the variation in behavior linked to comparison to the main secret data (CTRL, PIN), the executed series of complementary operations comprising a sequence of basic operations repeated K times, and the execution of said series being preceded by adjustment of execution parameters of said series, the parameters comprising:
the identifier of the sequence of basic operations to be executed, the sequence of basic operations being contained in a set of predefined basic operations, the number K of executions of the sequence of basic operations, the set of adjusted execution parameters (O, K) being specific to the set of test data received by the electronic component. |
