Adam10541 wrote:
I think RAR might have been a bad example ...
Yep.
Basically AFAICU a Rainbow Table is nothing but a (very large) "catalog" or "lookup table" for hashes.
If you have not the hash to look for and/or - like I believe it is the case for RAR encrypted format - the hash is a "salted" and "derived" one a Rainbow table won't be of any use or will be simply too big.
http://stackoverflow.com/questions/3817941/rar-passwords-why-dont-rainbow-tables-work
jaclaz
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