method for generating an asymmetric key pair intended for use in a cryptographic protocol

Abstract

A method for generating an asymmetric key pair comprising a private key and a public key, from a secret shared between a cryptographic device such as a smart card and a system, the method comprising the following steps implemented by the system: determination (100) of a differentiator; generation (104) of the public key from the differentiator and the secret; generation (106) of a digital certificate comprising the public key so as to attest to a link between the public key and a cryptographic device; and sending (108) of the digital certificate and the differentiator to the cryptographic device, the cryptographic device being configured to generate the private key from the differentiator and the secret and to use the private key in a cryptographic protocol that employs the certificate. Figure for the abstract: Fig. 3