Alliance chain data processing method and device based on homomorphic encryption algorithm

The invention belongs to the technical field of cryptology and alliance chains, particularly to an alliance chain data processing method and device based on a homomorphic encryption algorithm. The alliance chain data processing method comprises the following steps of S1, providing a homomorphic encryption library and generating a homomorphic key, performing encryption protection on data provided by a user by using a public key of the homomorphic encryption library, performing ciphertext operation during data processing, and performing encryption storage in a final account book; S2, encryptingnumerical values generated by other nodes to generate an encrypted value. According to the characteristic of homomorphic encryption, the data is in an encrypted state from beginning to end, so that the security of data processing is enhanced, and the whole-process encryption is realized; the trust degree between the alliance members is ensured even under the condition of multiple nodes; an integerring fully homomorphic en