Enigma Simulator - Fully functional, accurate simulator of the infamous German Enigma encryption machine invented in 1918.
GnuPG - Port of GnuPG (Privacy Guard) by Steffan Bellon.
PGP and Security Utilities - A collection of security utilities for RISC OS. Includes front ends for PGP, allowing PGP to be used for e-mail and files.
PhotoSteg - Will disguise any type of data within pre-drawn RISC OS 24- or 32-bit sprites.
