Brief description of the cryptographic signature of messages is safe strengthened, this verification of the signature, devices and the corresponding computer program products.

摘要

The present invention relates to a process for the cryptographic signature of messages to be reinforced security, using two sets of algorithms of the signature sa1 = {k1, s1, v1} and {sa2 = k2, s2, v2}, where k 1, si and vi are respectively of the algorithms for the generation of keys, signature, and verification of signatures, and comprising: - a stage for generation of keys is permanent, with the aid of the algorithm k1, delivering a pair of public and private keys {sk1, pk1}; and, for at least one message m to be signed: - a step of the signature comprising the - following steps: - receiving the message m to be signed; - generation, with the aid of the algorithm k2, a pair of keys ephemeral {sk2, pk2}; - calculation, for the signature algorithm s2, the signature s2 of the message m by means of the private key sk2; - calculation, for the signature algorithm s1, the signature c1 of the public key pk2 by means of the private key sk1; - supplies of the signature reinforced {s2, c1, pk2}.