Elliptic curve digital signature calculation method and device capable of resisting memory information leakage attack

The invention discloses a memory information leakage attack resistant elliptic curve digital signature calculation method and device, and belongs to the technical field of passwords. The method comprises the following steps: in an initialized trusted environment, placing a symmetric cryptographic algorithm key in a privileged register, generating a ciphertext of a random number k1 and a ciphertext of a private key by using the symmetric cryptographic algorithm key, and calculating a value obtained by multiplying a scalar by k1 * G; calculating plaintext data used for generating a parameter s based on a selected signature algorithm and the value obtained by multiplying the scalar by k1 * G during each signature, the plaintext data used for generating the parameter s comprising a parameter r or data calculated based on the parameter r; the register calculates a 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 di