Ruby/Password is a set of useful methods for creating, verifying, and manipulating passwords. It includes an interface to CrackLib, a library commonly used for checking password strength. It is intended to be used by system administrators who need to write Ruby programs that prompt for, generate, verify, and encrypt passwords.
The WiKID Strong Authentication System is a highly scalable, secure two-factor authentication system. It is simple to implement and maintain, allows users to be validated automatically, requires no hardware tokens, has a simple API for application support (via Ruby, PHP, Java, COM, Python, etc.), supports multiple domains, and supports replication for fault tolerance and scalability. It also supports mutual /host and transaction authentication, wireless tokens only domains, locked tokens (to your PC), anti-keystroke logger keypad PIN entry, etc.
The Ruby Crypt library is a Ruby implementation of a number of popular encryption algorithms. Block cyphers currently available include Blowfish, GOST, IDEA, and Rijndael (AES). Cypher Block Chaining (CBC) has been implemented. Twofish, Serpent, and CAST256 are planned for release soon. It is written entirely in Ruby so deployment is simple: no platform concerns, no library dependencies, and nothing to compile.
Rubyforger is a raw packet manipulation tool. It allows you to easily send, receive, and modify Ethernet, ARP, IP, TCP, UDP, and ICMP packets. Creating and modifying packets is easily done by adding layers and changing their parameters. Visualforge is a GUI packet crafter based on Rubyforger create, send, and receive packets and export the Ruby code in just a few clicks.