基于ElGamal体制的新的公钥体制  

New Public Key System Based on ElGamal System

作　　者：曲培娟[1] 

机构地区：[1]兰州理工大学计算机与通信学院,兰州730050

出　　处：《科学技术与工程》2008年第20期5679-5681,共3页Science Technology and Engineering

摘　　要：在ElGamal公钥体制的基础上提出了一种有限域上多项式形式的新的公钥体制,该公钥体制可以主动抵御选择明文攻击与各种选择密文攻击,包括IND-CCA2,并且可以一次可以对多个文件进行加密。由于公钥体制是基于离散对数问题,体制的安全性主要基于有限域上离散对数问题的难解性.因此,数学难解性保证了私钥不可破译。分析证明,该方案具有很高的安全性和易实现性。Based on E1Gamal public key system, a new public key system in the form of polynomial on finite field is proposed. This system can resist attacks from each kind of chosen plaintext and chosen ciphertext actively,including IND-CCA2, and encrypt muhi-files at one time. The system is based on the problem of discrete logarithm, its security rests in large part on the intractability of the problem of discrete logarithm on finite field. The mathematical intractability insures the private key non-attacked. The analysis shows that the scheme has high security and can be implemented easily.

关 键 词：ElGamal公钥体制 有限域 离散对数 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]