CMP [RFC4210] implementation based on OpenSSL
SCSI Tape Encryption Manager
Generates Latin squares and counts their transversals
Use an rtl2832 USB dongle to generate random data for the linux kernel
A command-line utility for calculating and verifying file checksums.
Support Tools for OpenSSH with multiple agents
PKI & Card Management System to issue and manage tokens & certificates
IPsec / IKEv2-based VPN software for Linux.
Open Source Security tool to audit hashed passwords.
Linux command line one time pad program
Free Encryption Tool
NCrypted - simple file encryption software with GPU support
Guncat acts like unix's cat, decrypting pgp encrypted sections
sha3sum - A demonstration of the Keccak permutation.
Easy to use GlobalPlatform tool (and a Java library)
NetCrypt - file-transfer utility providing secure data transfer