rjudge is a judge system for the Olympiad in Informatics. It can be also used as a problem test tool in the programming contest and daily practice. It provides many security features to ensure the smooth implement of judgement.
fm (file masker) is an easy-to-use command line cryptographic tool that's small, portable across operating systems, quite secure for most purposes, and licensed to you along with its source code under the gpl.
talkLock is voice encryption software for your cell phone. talkLock includes a server component so that you own all points of encryption and decryption of your communications.
Outdated! Only works for Firefox 3.0-3.2. ff3hr is a forensic tool to recover deleted history records from Firefox 3. FF3 uses various SQLite databases to store the history, and this tool can recover records from different tables in an disk image.
IceScan is a free open source network analyzing and security auditing tool for Unix-like and Windows operating systems. It uses libpcap, a packet capture and filtering library.
Easy-SEND is an implementation of the SEND (SEcure Neighbor Discovery) protocol for IPv6. It is aimed to be used for learning and testing purposes. SEND is described in RFC 3971. Easy-SEND includes a tool (CGAGen) to generate and verify CGAs (RFC 3972).
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Simple multi tool for scouts. It contains:
chat server
chat client
encryption tool
simple www browser
simple www editor
e-mail client (for sending messagess)
mass e-mail sender
Written in VS2008
UKey is an extension to the open-source encryption tool: TrueCrypt. With UKey you can use a USB key as replacement password for TrueCrypt. Currently the project is in a 'proof of concept' state, meaning it does work but it is not meant for daily use.
A steganography tool. You can hide 2Gb file in multiple images, supported almost all graphic formats. Average capacity ~ 40%. Useful for publishing censored materials in the Internet. Details on the project's website (stegoshare.sf.net).
TILT is a set of terminal logging and playback tools for auditing telnet and SSH connections made from a bastion host. It provides timestamped logs and real time playback of logs for incident reports, incident analysis or as a training aid
A tool to monitor internet hosts` bandwidth usage in a Linux-NAT network. A daemon collects data and clients display them (currently a Java applet with a graph). It automatically detects new hosts and has a nice summary statistic.
SING stands for 'Send ICMP Nasty Garbage'. It is a tool that sends ICMP packets fully customized from command line. Its main purpose is to replace the ping command but adding certain enhancements (Fragmentation, spoofing,...)
A tool to be used for newly created OSS web firewall/proxy/servers. Submit (GET/POST/HEAD) user-defined packets to web firewall to test its security strength. Tell you at which packet length a firewall will crash. Good for Heap/buffer overflow hunting.
Typical Web Firewalls use a mechanism to classify anomaly traffics. This tool submits an old-school malicious (not dangerous) request, and tells you the type of firewall a particular web site use (if any). Mainly useful for blackbox security assessment
MSN Shadow is a sniffer and spoofer tool for MSN protocol. It can decode MSN chat messages and video. Furthermore it can spoof messages and save the messages in HTML format and recording the sniffed video.