Based on sampling theorem, by the comparison of three sampling scheme, and the conclusion is drew that the black box of medium frequency digital is the most reasonable choice.
以采样定理为基础，通过对三种跳频电台采样方案的比较得出结论，黑盒中频数字化方法是目前最合理的选择。
A new password authentication scheme is proposed after introducing the famous Sunzi theorem and Euler function.
在介绍著名的孙子定理和欧拉函数的基础上，提出了一种新的口令验证方案。
A dynamic password authentication which is based on the Chinese remainder theorem and RSA public-key cryptography are represented. Finally analysis is made on the scheme security and feasibility.
最后提出一种基于公钥密码和中国剩余定理的动态口令验证方案，进行方案安全性及性能的分析。
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