demo_CA_system

说明：  MD5数字签名，加密算法，安全哈希加密算法(MD5 digital signature，encryption algorithm, encryption algorithm Secure Hash)

二级C语言教程，学习C语言必备教程，经典教程(Two C language tutorial to learn the necessary C language tutorial, classic tutorial)

说明：  实现国密算法的SM2、SM3、SM4，可以界面上测试算法的正确性，同时包含国密局公开的国密算法规范，这是信息安全的基本软件。(Encryption algorithm to achieve the country s SM2, SM3, SM4, you can test the correctness of the algorithm interface and also includes the country close to the national Bureau of Public encryption algorithm specification, which is the basic information security software.)

软考，嵌入式系统设计师，结合希赛多门指导书，精华读书笔记(Soft-test, embedded system designers, combined with the Greek race instructions over the door, the essence of reading notes)

EtherCAT基础技术介绍，讲的比较易懂。。。(EtherCAT basis of technical presentations, talking about relatively straightforward. . .)

剑指offer上的题目，求最小值的，比较基础，程序员面试别准备题目。(a problem in the way to offers.)

近几年的全国C++二级考试题目，考级的朋友可以参考一下啊(The recent years the National C++ two exams Grading Test friend reference)

计算机算法基础第三版华中科技大学4.5.6。8章课后答案(Computer algorithm based on the third edition of Huazhong University of Science 4.5.6. 8 after the answer)

hcne4.0教材，非常好的教材，考试认证必备(hcne4.0 materials, very good teaching, examination certification must)

sh-1的加密解密算法的实现，有相关文件和代码(sh-1 encryption and decryption algorithm, related documents and code)