08.06.2018 14:25, Hristo Stefanov wrote:
Yes CBC mode does that but since it is applied using the same IV and the
same key multiple times it is open to chosen-plaintext attacks as noted
here:
https://defuse.ca/cbcmodeiv.htm
A more real world example is given here:
https://stackoverflow.com/questions/3008139/why-is-using-a-non-random-iv-with-cbc-mode-a-vulnerability
This is applicable only to cases when first encrypted block in sequence contains
classified information. First encrypted block on Firebird pages contains pointers to
records or other internal structures which are not classified and their knowledge won't
help to get any useful information.
--
WBR, SD.
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