Electronic money/transport ticket signature verification having received signature with public key and condensed key calculated/compared stored condensed key with deciphering carried out corresponding certificate tables.

摘要

The electronic signature verification method has a stage with a table of certificates containing condensed forms of authorized public keys stored in memory, and an electronic signature verification phase (2) carried out. The microcircuit receives (21) the electronic signature to be verified together with a public key corresponding to the private key used for creating the electronic signature. A condensed form of the public key is calculated (22). The calculated key is compared to the condensed forms in the memory, and the key deciphered (25) corresponding to that in the table of certificates.