An all-homomorphic confusion method for a multiplier

The invention discloses an all-homomorphic confusing method for a multiplier. The isomorphic confusion method firstly encrypts the multiplier and the multiplicand of the multiplier in an isomorphic manner, and then the encrypted data is used for multiplication operation. When the key is input to the second input port of the multiplier, whether the input key is equal to the set correct key value isjudged, and the final product output is obtained by decrypting according to the judging conclusion. The invention has the advantages that the multiplier and the multiplier are all-homomorphic encrypted, and the product is confused to output, thereby preventing the original data of the multiplier and the multiplier from being embezzled, protecting the IP core of the multiplier, and improving the safety of the multiplier in the integrated circuit. 本发明公开了种用于乘法器的全同态混淆方法，该全同态混淆方法先对乘法器的乘数和被乘数进行全同态加密，然后利用加密后的数据进行乘法运算，当乘法器的第二输入端口有密钥输入时，此时判定输入的密钥与设定的正确的密钥值是否相等，根据其判定结论进行解密得到最终的乘积输出；优点是对乘数和被乘数进行全同态加密，并将积混淆输出，由此避免乘数和被乘数的原始数据被盗用，