新的同态加密方法——基于Paillier和RSA密码体制的代理重加密  

A new homomorphic encryption——proxy re-encryption based on Paillier and RSA

作　　者：段淑敏[1] 殷守林 张燕丽[1] 王学颖[1] 

机构地区：[1]沈阳师范大学科信软件学院,辽宁沈阳110034

出　　处：《微型机与应用》2016年第7期6-8,18,共4页Microcomputer & Its Applications

摘　　要：同态加密是一种加密形式,它允许特定类型的计算对密文进行加密,解密时对明文执行匹配结果的操作可以获得一个加密的结果,当对位于远程服务器上的数据做计算时,云供应商有必要访问原始数据并解密。为满足企业信息的数据和算法的私密性需求,数据加密方法与防篡改硬件技术被使用。公开加密数据的计算上,隐私的建立成为必要条件。此时同态加密方法被使用且提出一种基于Paillier和RSA密码体制的代理重加密技术。同态加密是一种无需解密即可在加密数据上进行计算的方法,与在原始数据上计算能够获得相同的结果,并通过使用代理重加密技术防止被选择的密文受攻击。Homomorphic encryption is an encryption form. It allows specific type computation to encrypt ciphertext. When deeryption, it can obtain one encryption result by matching the result of operations performed on the plaintext. When it does calculations on data located on a re- mote server, the cloud provider has to access the raw data and it will deerypt them. To realize this demand, data encryption and tamper-resist- ant hardware are used and this paper proposes proxy re-encryption scheme based on Paillier and RSA. But it is necessary to establish privacy for public encrypted data. So it introduces homomorphic cryptosystems. It is a method that enables us to carry on computations for encrypted data without decryption and provide the same result as well that the calculations were carried out on raw data and it uses proxy re-encryption technique that prevents ciphertext from chosen cipher text attack.

关 键 词：云计算 同态加密 代理重加密技术 数据安全 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]