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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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