This set of programs is intended to be used for digital business cards. It allows files to be AES (Rijndael) encrypted, so that they are individually accessible only via single-use passwords (transmitted using 168 bit Elliptic Curve Diffie-Hellman key swapping). In this way you can give people access only to certain parts of the information on the card. RISC OS and Windows front ends are included, and the code should compile for others, but requires the excellent MIRACL library.