This standard gives a specific definition of the ciphertext query algorithm based on integer homomorphic encryption, describes the mathematical background and mathematical problems it relies on, and provides corresponding security proofs. The standard text describes in detail the AGCD problem, how to select key parameters, the specific steps of key generation, the encryption and decryption process based on integer homomorphism, the generation process of the dense state database and the specific process of the ciphertext query algorithm. A set of reference example data for specific implementations is given in the appendix.
T/SCCIA 001-2019 history
2019T/SCCIA 001-2019 The standard of cryptographic query algorithm based on integer homomorphic encryption