Secure processing equipment, secure processing method, integrated circuit method, a program, and storage medium embedded obfuscation secret information

摘要

An object of the present invention is that when performing secure processing using confidential information that should be concealed, and executes the secure process while avoiding exposure of the secret information by an unauthorized analysis of the dump of the memory. In the signature generating apparatus 100 for performing a signature using the signature key d for a message M, and dividing the secret key is divided into at least two signature key d, the split key storage unit 110, the signature key d from the split secret key and signing key generation equation F to calculate, and stores the signature creation expression signature key generation identity generating means 120, signature key using associative law, distributive law, the commutative law, to obtain the same results as the signing key generation equation F and to generate a combined split key is the result of generating a generated identity G, coupling the split key generation unit 130, should be given as an argument to the signature key generation identical equation G, was calculated the split private key, the signature generation unit 150, the Based on the signature key generation identical equation G, and with the split secret key to said message, and performs signature.