Method for the authentication of a first electronic entity by a second electronic entity, and electronic entity implementing such a method
AssigneeOberthur Technologies
InventorsEmmanuelle DOTTAX, Florian GALDO, Jean-Philippe VALLIERES
Life of this patent
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Abstract
A method for the authentication of a first electronic entity (C) by a second electronic entity (H), wherein the first electronic entity (C) implements the following steps: reception of a challenge (HCH) from the second electronic entity (H); generation of a number (CCH) according to a current value of a counter (SQC) and a first secret key (K-ENC); generation of a cryptogram (CAC) according to the challenge (HCH) and a second secret key (S-MAC); and transmission of a response including the cryptogram (CAC) to the second electronic entity (H), without transmission of the number (CCH).
Claims16
A method of authentication of a first electronic entity by a second electronic entity including the following steps implemented by the first electronic entity:
- reception of a challenge originating from the second electronic entity;
- generation of a number as a function of a current value of a counter and of a first secret key;
- generation of a cryptogram as a function of the challenge and of a second secret key;
- transmission to the second electronic entity of a response including the cryptogram without transmission of said number.
An electronic entity comprising:
- means for receiving a challenge originating from another electronic entity;
- means for generating a number as a function of a current value of a counter and of a first secret key;
- means for generating a cryptogram as a function of the challenge and of a second secret key;
- means for transmitting to the other electronic entity a response including the cryptogram without transmission of said number.
Dependencies are inferred from the claim text.