2014-02-25 1:36 GMT+01:00 Anthony Thyssen <a.thys...@griffith.edu.au>:
> On Mon, 24 Feb 2014 14:25:40 +0100 Ben RUBSON <ben.rub...@gmail.com>
> wrote:
> |
> | To be sure that all IOs of one file will be aligned, does the encryption
> of
> | 4K of data give exactly 4K of encrypted data ?
> |
> encryption happens in 'blocks of data'. If the data encrypted in
> is less a block in size it increases to that block size.
>
In this situation, we are sure that all IOs will be aligned.
However, is the following situation possible ?
Can we have the size of an encrypted block of data bigger than the size of
the block of data itself ?
In other words, can we have :
size(encrypt($block_of_data)) > size($block_of_data)
This could lead into a misalignment somewhere in the file, or EncFS could
have to read 2 disk blocks to serve 1 data block.
Thank you,
Best regards,
Ben
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