这是一个VHDL程序的CRC编码器

ieee一种基于混沌的新加密方法An Image Encryption Scheme Based on Chaotic Map - In this paper, a novel block digital image encryp- tion scheme based on a chaotic coupled map lattices (CML) is reported. Within this scheme, an original image is decomposed into sub-blocks with a given size, and an external secret key with 192-bit is used and mapped to the system parameters, which are employed to generate a spatiotemporal chaotic binary sequence matrix to encrypt the block original image. Besides, the former sub-block encrypted result will be acted as a feedback to the following sub-block encryption proc- ess. The proposed scheme is described in detail, along with the security analyses such as key space analysis, sensitivity analysis, information entropy analysis and correlation coefficients analysis of adjacent pixels. The computer simulation results indicate that the suggested image encryption scheme has some properties desir- able in a good security

提供服务端登陆验证程序（验证码随机改变，防止非法进入）； 提供服务器控制程序，管理员可以允许、屏蔽和删除一个注册用户的登陆客户端； 任何改变访问地点的行为，都必须得到管理员的授权，否则无法登陆系统； 即使知道其他用户的密码也不能登陆系统。-provide certification services-landing procedures (Random Verification code change to prevent illegal entry); Provide server control procedures, administrators can allow, shielding and delete a user"s landing client; Any change in location of the visit have to be authorized administrators, whether while not landing systems; even if they know the password for other users can not landing system.

已经通过AES认证的AES的DELPHI实现，比较好，大家自己试试看，搜的-AES has been certified by the AES DELPHI, the better, we all give it a try and found the

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

把AES算法封装成DLL方便掉用。 我只是做了简单修改，版权归原作者所有-put into AES Packaging swap used to facilitate DLL. I just made a simple change Lastings all the original author

Ｃ＋＋语言实现智能卡研发技术，实现智能卡的ＭＤ５，ＤＥＣ，ＳＨＡ，ＲＳＡ等加密技术，欢迎大家下载，交流并研究．-C++ Language development of smart card technology, smart cards MD5, DEC, SHA, RSA encryption technology, etc., all are welcome to download, share and study.

我根据comp430s改写的DLL源码，可在多线程下使用。还带有DES加密算法函数 -DLL source which is overwirted by comp430s, can be used in multi-thread.Attached by DES encryption Algorithm

快速去除PDF密码设置，不用安装，直接使用-Quick removal of PDF password settings, do not need to install, direct use

--- --- ---haval代码--- --- --200种加密算法中的一种------------- haval------------ 200 species of an encryption algorithm

one of example about hardware design language