Privacy calculation unit, acceleration unit, system on chip, and privacy calculation method

A privacy calculation method, applied to a current privacy calculation unit, the privacy calculation method comprising:

• calculating a plurality of first domain conversion ciphertexts sequentially, and storing the calculated first domain conversion ciphertexts, wherein each of the first domain conversion ciphertexts is an intermediate ciphertext when first to-be-converted data is converted from a first privacy-preserving computation domain to a second privacy-preserving computation domain;
• and
• sending, in a process in which a postorder first domain conversion ciphertext is calculated, a preorder first domain conversion ciphertext to a target privacy calculation unit other than the current privacy calculation unit, to enable the target privacy calculation unit to generate first converted data corresponding to the first to-be-converted data in the second privacy-preserving computation domain according to the preorder first domain conversion ciphertext,
• when the first privacy-preserving computation domain is the secret sharing domain, and the second privacy-preserving computation domain is the homomorphic encryption domain, performing:
• reading the first to-be-converted data;
• and
• performing homomorphic encryption on the first to-be-converted data based on a public key of the current privacy calculation unit, to obtain the first domain conversion ciphertexts, to enable the target privacy calculation unit to calculate the first converted data corresponding to the first to-be-converted data and second to-be-converted data in the homomorphic encryption domain.

A non-transitory computer-readable storage medium storing a program that is executable by a device to cause the device to perform operations of a privacy calculation method, the operations comprising:

• calculating a plurality of first domain conversion ciphertexts sequentially, and storing the calculated first domain conversion ciphertexts, wherein each of the first domain conversion ciphertexts is an intermediate ciphertext when first to-be-converted data is converted from a first privacy-preserving computation domain to a second privacy-preserving computation domain;
• and
• sending, in a process in which a postorder first domain conversion ciphertext is calculated, a preorder first domain conversion ciphertext to a target privacy calculation unit other than the current privacy calculation unit, to enable the target privacy calculation unit to generate first converted data corresponding to the first to-be-converted data in the second privacy-preserving computation domain according to the preorder first domain conversion ciphertext,
• when the first privacy-preserving computation domain is the secret sharing domain, and the second privacy-preserving computation domain is the homomorphic encryption domain, performing:
• reading the first to-be-converted data;
• and
• performing homomorphic encryption on the first to-be-converted data based on a public key of the current privacy calculation unit, to obtain the first domain conversion ciphertexts, to enable the target privacy calculation unit to calculate the first converted data corresponding to the first to-be-converted data and second to-be-converted data in the homomorphic encryption domain.