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对椭圆曲线上ElGamal密码体制的攻击

发表时间:2012-04-30  浏览量:1629  下载量:743
全部作者: 冯晓博,王明强
作者单位: 山东大学密码技术与信息安全教育部重点实验室
摘 要: 提出一种攻击椭圆曲线上ElGamal加密体制的算法。如果密码体制所在群的阶满足一些条件,该攻击方法可以通过使用一次解密喻示恢复出密钥。使用提出的攻击算法可以99.4%的概率恢复出密钥的部分信息。最后给出应对该攻击方法的措施。
关 键 词: 数据安全与计算机安全;椭圆曲线;离散对数问题;Pohlig-Hellman算法;选择密文攻击
Title: Attack on EC ElGamal cryptosystem on elliptic curve
Author: FENG Xiaobo, WANG Mingqiang
Organization: Key Laboratory of Cryptologic Technology and Information Security, Ministry of Education, Shandong University
Abstract: This paper provides a method to attack ElGamal cryptosystem. If the cyclic group G which the cryptosystem is based on satisfying of some conditions, the private key can be gotten by applying one-time decryption oracle. By applying the attack method, the partial information of the private key with high probability can be gotten at success probability of 99.4%. At last, the paper presents the measurements to avoid this kind of attack.
Key words: data security and computer security; elliptic curve; discrete logarithm problem; Pohlig-Hellman algorithm; chosen-ciphertext attack
发表期数: 2012年4月第8期
引用格式: 冯晓博,王明强. 对椭圆曲线上ElGamal密码体制的攻击[J]. 中国科技论文在线精品论文,2012,5(8):721-725.
 
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