面向数据库加密的秘密同态算法的研究

Research of privacy homomorphism algorithm based on encrypted database

在Dom ingo提出的秘密同态加密算法的理论基础上,给出了一种将浮点数转换为整数的同态运算,基于复合同态的数学理论基础,提出了类复合同态的概念并扩展应用到了实现浮点型数据的同态加密机制中。最后利用中国剩余定理实现了字符串数据的加密。

On the basis of Domingo＇ s privacy homomorphism algorithm theory, this paper gave a homomorphism operation that could convert data from floating-point to integer. Based on the mathematical theory of compound homomorphism,raised and ap- plied a similar-compound homomorphism notion in the encryption mechanism over float-point data. Besides, achieved the en- cryption of string using the Chinese remainder theorem in the text at last.