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Re: Encrypted swap and partitions



On Fri, Aug 15, 2003 at 06:56:16PM +0200, Vincent Bernat wrote:
> OoO Lors de la soir?e naissante du vendredi 15 ao?t 2003, vers 17:15,
> Marc Singer <elf@buici.com> disait:
> 
> >> Encrypted partitions need user interaction to be mounted (the password
> >> is not generated on the fly, like for the swap), 
> 
> > I thought I just read that it is possible to mount swap without
> > entering a password.  Sadly, i cannot now find the reference.  It said
> > that with certain loopback options, the swapfile is mounted with a
> > random key generated by the kernel.
> 
> Yes, it is possible. Use mcookie to build a password (or any other
> tool), then instruct losetup to read the password from stdin (-p 0).

I must defer to you on this since I cannot reproduce the reference.
What I recall is that the key was generated on-the-fly by one of the
kernel components.

Cheers.



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