计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
22期
100-103
,共4页
数字签名%代理签名%公钥替换攻击%可证明安全
數字籤名%代理籤名%公鑰替換攻擊%可證明安全
수자첨명%대리첨명%공약체환공격%가증명안전
digital signature%proxy signature%public key substitution attack%provable security
通过对鲁荣波等人提出的新型代理签名方案进行分析，指出该方案不满足公钥替换攻击，并给出了攻击方法。在此基础上提出一种改进的代理签名方案，克服了原方案的安全缺陷，有效地防止原始签名人的伪造攻击。与原方案相比，改进的方案在效率不变的情况下具有更高的安全性。
通過對魯榮波等人提齣的新型代理籤名方案進行分析，指齣該方案不滿足公鑰替換攻擊，併給齣瞭攻擊方法。在此基礎上提齣一種改進的代理籤名方案，剋服瞭原方案的安全缺陷，有效地防止原始籤名人的偽造攻擊。與原方案相比，改進的方案在效率不變的情況下具有更高的安全性。
통과대로영파등인제출적신형대리첨명방안진행분석，지출해방안불만족공약체환공격，병급출료공격방법。재차기출상제출일충개진적대리첨명방안，극복료원방안적안전결함，유효지방지원시첨명인적위조공격。여원방안상비，개진적방안재효솔불변적정황하구유경고적안전성。
In this paper, a new proxy signature scheme proposed by Lu Rong-bo et al. is given a detailed cryptanalysis. This paper points out that this scheme is not secure against public key substitution attack and proposes a method to attack the new scheme. Based on this, one improved scheme is given and concluded that it is not only secure against the original signer’s forgery attack effectively but also avoiding the problems of the original scheme. Compared with the original scheme, the new scheme is more security and has the same computation complexity.
