Re: Self-destruct password

[Tim Walberg <tewalberg@mediaone.net>]

And what do you do should you have a power failure half-way
through, unless you do some very careful checkpointing, and
other such safeguards...? I think the 'use two loopback
devices and dd from one to the other' concept is probably
about the best answer to this.


			tw


On 04/23/2001 12:00 -0700, Dan Hollis wrote:
>>	On Mon, 23 Apr 2001, Alexander S A Kjeldaas wrote:
>>	> You should be able to change passwords quite simply by losetuping two
>>	> versions of the encrypted volume - one device with the old password
>>	> and one device with the new password.  Then dding from the old device
>>	> to the new device.
>>	
>>	In theory, it should be possible to write a standalone program to convert
>>	the passphrases of a encrypted volume "in-place", yes?
>>	
>>	It would read each block using old passphrase, and write it using the new
>>	one.
>>	
>>	Of course, there are extra variables such as the block size... :-(
>>	
>>	-Dan
>>	
>>	
>>	Linux-crypto:  cryptography in and on the Linux system
>>	Archive:       http://mail.nl.linux.org/linux-crypto/
End of included message



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