Cryptography and Network Security, 4th Ed.

Twofish 采用128位数据块(128 bits lock)，128-192-256-bit 可变长度密钥。-using Twofish 128 blocks of data (128 bits lock) EliteConnect (TM) Universal-192-256-bit variable-length keys.

对ORCLE数据库进行保护，具有很强的功能，有加密，访问，删除，等保护功能-right ORCLE database protection, and highly functional, encryption, access, deletion, such as the protection function

资源描述在IP层加密的IPSEC源码，包括各个模块的测试代码，可以针对具体的TCPIP协议栈进行移植，本人已经在uc/tcpip协议栈上进行了移植，测试成功，实现了局域网内多个节点的安全通信

md5的vb源代码

MD5加密算法源代码,对于初学者有很好的借鉴意义！-MD5 encryption algorithm source code, there are very good for the beginners learn the meaning of!

Proguard是强大的Java字节码混淆器，含有源代码，可以根据自己需求修改编译。满足自身需求。 也可以作为爱好者自学的好材料。

加密技术源代码学习加密技术-encryption technology to study the source code encryption technology

Motivation - A simple DES core  - Fast and Small Version  - Open Source Compatibility I believe that the core complies to NIST-800-17. However, there has been no formal third party verification. The official NIST specification can be downloaded here: 800-17.pdf. For the Triple DES, the NIST reference is located here: 

另一种公开密钥加密算法的Pascal实现和例子。实现了签名和确认- Another kind of public key encryption algorithm Pascal realization and example. Realized has signed and confirmed

md5及sha-1算法及验证文件，vc6.0调试无误-md5 and sha-1 algorithm and verification documents, vc6.0 debug and correct