GMCA

数字密写与密写技术 F5的Matlab源程序(Digital Steganography Steganography technology and F5 s Matlab source code)

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

说明：  SM2 SM3 X.509 国密 证书 国密算法 国密证书 生成签发 相关代码 包含sm2国密算法密钥生成，证书请求生成，数字证书生成，sm3withsm2国密数字签名示例(SM2 SM3 X.509 Secret Certificate Secret Algorithms Secret Certificate Generation and Issuance of Related Codes Including SM2 encryption algorithm key generation, certificate request generation, digital certificate generation, sm3withsm2 encryption digital signature example)

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)

运用典型的ssh2框架，具有上传文件，加解密，数字签名和身份认证等功能(Use ssh2 typical framework, with the uploaded file encryption and decryption, digital signature and authentication functions)

STEGNOGRAPHYIn digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it.

说明：  说明： 1、里面有什么： 1.1、org.bouncycastle.*下的所有软件是bouncycastle组织开发的软件包 1.2、org.infosecurity.*下的软件包括： DES_CBC算法的实现 RSA算法的实现（包括：密钥生成、公钥加密和私钥解密、数字签名及签名验证） 数字信封的实现 　 利用数字信封实现大文件的加密、解密。 2、有什么用： 　　2.1 研究、学习信息安全中的密码学设计与实现技术。 　　2.2 当然如果大家觉得在其它地方用的上，我会觉得很高兴的。 3、还有什么改进： 3.1 对文件加密、解密的时候要频繁的IO，如果加一个缓冲区，比如10K、50K等， 只有缓冲区满了才写入DISK这样将提高效率。 3.2 RSA私钥积存的时候可以按PKCS8形式，再经BASE64编码保存比较好。(Note : 1, mean there : 1.1, org.bouncycastle .* of all software development organizations is bouncycastle package 1.2, org.infosecurity .* The software includes : DES_CBC algorithm to achieve the realization of the RSA algorithm (including : key generation, public key and private key encryption decryption, digital signatures and signature verification), the realization of digital envelope using digital envelope realize document encryption, decryption. Two, what is the use of : 2.1, learning the information security cryptography design and technology. 2.2 Of course, if you think in the other parts, I feel very happy. Three, what is there for improvement : 3.1 pairs of file encryption, decryption, and the time to frequent the IO, plus a buffer, such as 10K, 50K, the only buffer is needed for)

Chiper DES, Full Functions

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.)

说明：  基本实现了数字证书的制作、SSL安全通讯、加解密操作等功能(basically achieved the production of digital certificates, SSL security communications, encryption and decryption operation functions)