Method of processing perfect homomorphic encryption based on modulo arithmetic

摘要

PROBLEM TO BE SOLVED: To provide an encrypted text multiplication noise and a result of encrypted text addition which are difficult to control by the conventional processing method of full homomorphic encryption based on modulo operation and a result of encrypted text addition and If they are equal, the result of encryption due to an error during decryption being the result of encryption addition can not be decoded correctly. SOLUTION: The present invention discloses a processing method of perfect homomorphic encryption based on modulo operation including the following steps. Get the clear text of any numeric data type being encrypted, convert it to the corresponding carry bit clear text according to the demand for encryption, and encrypt it for each number in the obtained carry bit clear text Perform an encryption operation and combine the encrypted texts obtained by the encryption operation to obtain a combination of corresponding encrypted texts, and obtain an encrypted text original code based on modulo encryption, an encrypted text reverse code and an encrypted text complement code The encrypted text acquired by is added, subtracted, multiplied and divided by the encrypted text by perfect homomorphic dark combination based on the conventional modulo operation, and the result of the encrypted text operation acquired by modulo division is decrypted. Get decrypted clear text. [Selected figure] Figure 1