ELLIPTIC CURVE DIGITAL SIGNATURE CALCULATION METHOD RESISTANT TO MEMORY INFORMATION LEAKAGE ATTACKS, AND APPARATUS

Disclosed are an elliptic curve digital signature calculation method resistant to memory information leakage attacks, and an apparatus, belonging to the technical field of cryptology. The method comprises: in a trusted initialization environment, placing a symmetric cryptographic algorithm key in a privileged register, using the symmetric cryptographic algorithm key to generate a ciphertext of a random number k1 and a ciphertext of a private key, and calculating a value of scalar multiplication k1×G; during signature every time, on the basis of a selected signature algorithm and the value of scalar multiplication k1×G, calculating plaintext data used for generating a parameter s, the plaintext data used for generating the parameter s comprising: a parameter r or data calculated on the basis of the parameter r; the register calculating the parameter s according to the plaintext data, the ciphertext of the random number k1 and the ciphertext of the private key; and outputting (r, s) as a digital signature of a