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loop-AES password change?

Hi,

I was just trying to work out the best way to setup loop AES with a changeable 
password. I.e. Similar behaviour to PGPDisk. I assume the way it works is 
that your password is used to encrypt the session key and the session key is 
what is actually used to encrypt the data. Therefore you can change the 
password without having to re-encrypt the whole device.

From what I have read it seems that the right way to do this with loop-AES is 
to use a GPG key to encrypt the "session key". Is this correct? Is there any 
more info/examples?

thanks, Iain.
-- 
GnuPG key: 580EE8D7 available on public key servers.
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Linux-crypto:  cryptography in and on the Linux system
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