Committee verification method and device based on homomorphic encryption

The invention relates to the technical field of communication, and provides a promise verification method and device based on homomorphic encryption. The method comprises the following steps: processing plaintext data of a commitment party to obtain a first prime number; randomly generating a blinding factor, and generating a first committed ciphertext value of the plaintext data according to the first prime number and the blinding factor; generating a second commitment ciphertext value according to the totaling of the first prime number and the totaling of the blinding factor; if the second commitment ciphertext value is equal to the sum of the first commitment ciphertext values of the N pieces of plaintext data, it is determined that private transactions exist among N commitment parties corresponding to the N pieces of plaintext data. According to the promise verification method and device based on homomorphic encryption, when whether the private transaction exists or not is verified, specific plaintext dat