It is shown that the combination of chaotic encryption and conventional encryption is important for raising the security of cryptosystems.
分析表明，这是提高加密系统安全性的一个新的重要研究课题。
Using the theorem of linear Diophantine equations and the Chinese remainder theorem, we have constructed a class of trap-door knapsack public-key cryptosystems, which have a better security.
利用不定方程理论及中国剩余定理，我们设计了一类陷门背包公开钥密码系统，它们具有更好的安全性。
The security of these new cryptosystems depends on some NP-complete problems in the theory of Diophantine equations and on the difficulty of large number decomposition.
这些体制的安全性依赖于求解丢番图方程中的一些NP完全问题和大数的素因子分解的困难性。
There are many intractable problems in number theory, many cryptosystems were established of which the security is based on the intractability of these problems.
数论中存在着许多难题，很多密码体制就是以这些难题为安全性基础的。
This paper analyzes the security of a certificateless proxy signature scheme and shows that it is insecure against the public key replacement attack in certificateless cryptosystems.
对无证书代理签名方案进行安全性分析，指出该方案对于公钥替换攻击是不安全的，并给出具体的攻击方法。
In this lecture the speaker will demonstrate sample algebraic and number theory applications in information security, in particular, in the design of cryptosystems.
在此讲座中，报告人将用实例展示代数和数论在信息安全，特别是密码系统设计中的应用。
In this lecture the speaker will demonstrate sample algebraic and number theory applications in information security, in particular, in the design of cryptosystems.
在此讲座中，报告人将用实例展示代数和数论在信息安全，特别是密码系统设计中的应用。
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