James Still says:
In case someone isn't familiar with Mike's excellent program, it does for hard drives, what PGP does for messages. With Secure Drive (ver 1.0) you can set up a partition on your hard drive encrypt it (SecDrv uses the IDEA cipher for data and RSA for your pass phrase just like PGP) and access the encrypted drive from a TSR in your C drive.
In my opinion, this is the best example yet since PGP of "cypherpunks writing code" because of the implications that this program has on privacy.
There is also cypherpunk Matt Blaze's "CFS" filesystem for unix machines, which is very powerful but unfortunately unreleased to the public, and "KFS", which is a similar file system that unfortunately currently lacks some of the cryptographic security (and has some bad bugs) but which will doubtless be up to speed soon. Perry