Cryptographical reinforced secure signature process for messages, signature verification process, and corresponding systems and program products

摘要

The method involves implementing two sets of signature algorithms (SA1, SA2). The implementation is made by generating permanent keys using a key generation algorithm K1 and delivering a pair of private and public keys (sk1, pk1). An ephemeral key pair (sk2, pk2) is generated using another key generation algorithm K2, where sk2 and pk2 are private key and public key, respectively. A signature S1 of a message m and the signature C1 of public key pk2 are calculated using private keys (sk1, sk2) by the signature algorithms (S1, S2) respectively, and a strengthened signature is provided. Independent claims are also included for the following: (1) a method for verifying cryptographic message signature (2) a cryptographic message signature device comprising an implementation unit (3) a cryptographic message signature verification device comprising verification unit (4) a computer program product comprising a set of instructions to perform a method for implementing cryptographic message signature method.