QUANTUM HOMOMORPHISM SYMMETRY SEARCHABLE ENCRYPTION METHOD AND SYSTEM

摘要

The present invention is suitable for data encryption searching. Provided is a quantum homomorphism symmetry searchable encryption method, comprising: A, randomly generating a plurality of private keys; B, encrypting plaintext data according to the private keys and keywords, and then saving same in a cloud server; C, according to ciphertext to be sorted, determining ciphertext corresponding to an identity identifier, and sorting the ciphertext containing the same identity identifier by means of a simplification operation to obtain an index table; D, encrypting search keywords according to reversed offset of the private keys, searching the ciphertext of the same user in the index table according to the encrypted search keywords and the identity identifier, and returning same; and E, decrypting a search result according to the private keys, and obtaining a decryption result. Plaintext information is encrypted by utilizing private keys and keywords, the generated ciphertext is saved in a cloud server, a data user can search ciphertext containing keywords by utilizing the characteristics of a quantum homomorphism encryption algorithm, and any information about the plaintext cannot be revealed without private keys.