机构地区: 仲恺农业工程学院计算机科学与工程学院
出 处: 《仲恺农业工程学院学报》 2009年第3期33-35,共3页
摘 要: 利用Alice和一个预言机之间进行的合理交互,通过把明文的二次剩余特性与对应的密文联系起来,详尽论证了ElGamal密码算法在自适应选择明文攻击下的不安全性,同时给出改进型ElGamal算法在自适应选择明文攻击下的形式化安全性证明. Using the construction of reasonable interaction between Alice and a random oracle, ElGamal was claimed to be not an security algorithm by analysis on the correlative relation in plaintext' s quadratic residue and its cipher-text. The modification of EIGamal algorithm was analyzed as well, in which the security against adaptive chosen-plaintext attack was given.
领 域: [自动化与计算机技术] [自动化与计算机技术]