UNSAFE really tries to be safe, this new version uses SAFER-SK, BLOWFISH, IDEA, MD5 and QCYPHER. I think that any cryptosystem uses six algorithms to encrypt. UNSAFE employs cbc mode mixed with some rare methods written by me.

UNSAFE is coded in Turbo C 2.01 for MS-DOS. It is a spare-time project being written only by me.
I choose TC 2.01 'cause it's a very good compiler and totally free. Borland
distributes this compiler freely because its too old. But i think that is too
cool.

It's not the final version, and new versions will be very different and may be
incompatible with this. But im sure that is a good version to encrypt your top secret data.

This system includes the original source code, with all algorithms and
functions and three docs (crypto.faq, rsacrypt.20 and guia.spa) to answer all questions about today's cryptography.