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This is just a simple frontend module for autoloading of various Digest:: modules. It also provide documentation of the interface that all Digest:: modules should provide.

The Crypt::RIPEMD160 module allows you to use the RIPEMD160 Message Digest algorithm from within Perl programs. The module is based on the implementation from Antoon Bosselaers from Katholieke Universiteit Leuven.

Perl binding to modified RSA library (yamrsa) for encrypting Yandex auth token

Cryptographic library to perform identification using Schnorr Identification scheme and Blind RSA Signatures.

Rabbit is a new stream cipher based on the properties of counter assisted stream ciphers, invented by Martin Boesgaard, Mette Vesterager, Thomas Pedersen, Jesper Christiansen, and Ove Scavenius of Cryptico A/S.

This is an implementation of the Automated Password Generator standard, defined in FIPS Publication 181, "Standard for Automated Password Generator":

arpCounterattack is a program for detecting and remedying "ARP attacks." It monitors traffic on any number of Ethernet interfaces and examines ARP replies and gratuitous ARP requests. If it notices an ARP reply or gratuitous ARP request that is in conflict with its notion of "correct" Ethernet/IP address pairs, it logs the attack if logging is enabled, and, if the Ethernet interface that the attack was seen on is configured as being in aggressive mode, it sends out a gratuitous ARP request and a gratuitous ARP reply with the "correct" Ethernet/IP address pair in an attempt to reset the ARP tables of hosts on the local network segment. The corrective gratuitous ARP request and corrective gratuitous ARP reply can be sent from an Ethernet interface other than the one that the attack was seen on.

autossh 程序，启动一个 ssh 副本并监视它，必要的时候重启它，比如它死了 或者停止通信了。 最初的想法和机制来自 rstunnel（可靠的 SSH 隧道）。这个版本的方法有所 改变：autossh 使用 ssh 来构建 ssh 转发环路（一个从本地到远程，一个从 远程到本地），然后发送测试数据并期待其返回。（这个想法得感谢泰伦斯·马丁。）

Avcheck is a simple program that allows you to call an antivirus software in order to check mail messages for viruses before actual delivery from within a Mail Transfer Agent, or MTA. Avcheck itself isn't a virusscanner, nor it is an MTA. It sits between the MTA and a real antivirus software. Most MTAs available today can call an external program for every mail message in order to perform various tasks, including virus scanning and content filtering. Avcheck can be used as that external program. Avcheck will receive a mail message from a mail system, pass it to an antivirus software, and, depending on the presence of a virus in that message, will either allow the message to be delivered or take appropriate actions to handle infected mail. Avcheck does nothing with a mail message contents -- it's task is to prepare file with a mail message and feed it to an antivirus progra. It's an antivirus task to decode MIME structure, handle embedded archives and so on. Many but not all antivirus products today have this ability.

The axTLS project is an SSL client/server library using the TLSv1 protocol. It is designed to be small and fast, and is suited to embedded projects. A web server is included.