This program relates to an obsolete Pay TV encryption system and is not intended to aid in pay television piracy in the present day.

Release notes:

It could be used to make a very strong file encryptor, which is what I intend to do. I just completed the encrypt algorithm today (it is the decrypt you see in the current video). The current download link shows that.

What I intend to do is keep the source public, so everyone can see the crypt algorithms, but it would still take a worldwide distributed computing effort to brute force the key.