期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Some Remarks on Cocks'Identity-Based Encryption Scheme
1
作者 ZHAO Xiaopeng 《Journal of Donghua University(English Edition)》 CAS 2024年第4期447-450,共4页
The theory of quadratic residues plays an important role in cryptography.In 2001,Cocks developed an identity-based encryption(IBE)scheme based on quadratic residues,resolving Shamir’s 17-year-old open problem.However... The theory of quadratic residues plays an important role in cryptography.In 2001,Cocks developed an identity-based encryption(IBE)scheme based on quadratic residues,resolving Shamir’s 17-year-old open problem.However,a notable drawback of Cocks’scheme is the significant expansion of the ciphertext,and some of its limitations have been addressed in subsequent research.Recently,Cotan and Teşeleanu highlighted that previous studies on Cocks’scheme relied on a trial-and-error method based on Jacobi symbols to generate the necessary parameters for the encryption process.They enhanced the encryption speed of Cocks’scheme by eliminating this trialand-error method.Based on security analysis,this study concludes that the security of Cotan-Teşeleanu’s proposal cannot be directly derived from the security of the original Cocks’scheme.Furthermore,by adopting the Cotan-Teşeleanu method and introducing an additional variable as a public element,this study develops a similar enhancement scheme that not only accelerates the encryption speed but also provides security equivalent to the original Cocks’scheme. 展开更多
关键词 identity-based encryption(IBE) quadratic residue SECURITY Cocks’IBE scheme
下载PDF
一个新的(t_0, t, n)门限签名方案
2
作者 刘春林 徐秋亮 江楠 《计算机工程》 CAS CSCD 北大核心 2003年第21期134-135,共2页
提出了一个新的(t0, t, n)门限签名方案。该方案适用于签名成员中存在特殊 成员的情形。与已有的(t, n)门限签名和(ti, t, n)门限签名相比,该方案具有如下特 点:(1) 系统中存在特殊与普通两类成员,他们在签名中的作用不同;(2)... 提出了一个新的(t0, t, n)门限签名方案。该方案适用于签名成员中存在特殊 成员的情形。与已有的(t, n)门限签名和(ti, t, n)门限签名相比,该方案具有如下特 点:(1) 系统中存在特殊与普通两类成员,他们在签名中的作用不同;(2) 当参与签名的一 般成员达到绝对多数时,可强行对消息签名。 展开更多
关键词 (t0 t n)门限 特殊成员 强行签名
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部