Good crypto products?

[Rob Lemos]

Can anyone recommend a good product for encrypting information on the fly,
meaning encrypt the file when you close it and decrypt it when you open it.
It would also be nice if it would ask you whether you wanted the file you
are just closing to be encrypted. That is, it builds a list as you use your
computer, rather than requiring the user to be explicit up front.

PGP requires too many steps to be truly useful here. Any suggestions?

-R