Re: Encrypted "virtual" disk

Daniel G. Linder (
Mon, 10 Feb 1997 08:59:49 -0600 (CST)

On Mon, 10 Feb 1997, Jeremey Barrett wrote [paraphraised]:
> I am interested in writing a cryptographic "virtual" disk or filesystem.
> My goals/ideas are the following:
> o To be able to create/mount/unmount files as encrypted disks...
> o Not being required to create a physical partition is critical.
> o The crypto-fs code would require a passphrase upon mounting.
> o When a file is read ... decrypts it.
> o Writing works much the same way, encrypting before "really" writing.

Am I missing something, or are these supported in the loop filesystem?
Loop has various encryption built in, files are virtual filesystems...
The only thing that I don't know about is the timeout unmount -- might
have to be an addition to loop-fs if it is not already there.