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SubjectRe: loop under 2.2.20 - relative block support? wrote:
> What exactly is the status of the loopback device in 2.2.20 with regards
> to relative block support? Is it *really* supported?
> The reason I am asking is that I've run into trouble retrieving data off
> of a loopback file after I switched to a new machine. I was using loopback
> in combination with the kerneli patch to mount an encrypted filesystem
> and backup my data to it for safe transport to another machine. The
> decryption seems to be largely successful, since I am able to see most of
> the data when peering at the decrypted file using a hexeditor.

Kerneli patches use block size dependant IV computation (also called "time
bomb" IV). Shit hits the fan when you move files to a device with different
block size. Search linux-crypto archives for more information.

Jari Ruusu <>
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