On 16 August 2013 16:46, Swair Mehta <[email protected]> wrote:
> On 16-Aug-2013, at 7:49 AM, Unga <[email protected]> wrote:
>
>> Hi all
>>
>> I have a requirement to encrypt files, in such a way identical files should 
>> generate identical ciphertexts.
>>
>> I plan to use aes-256-cbc cipher with 128-byte long non-guessable password 
>> per input file. Identical input files will be provided with identical 
>> passwords.
>>
>> 1. Is it no salt the way forward for me?
>>
>>
> Identical salts(ivs) should work. No salt works as well.
>

This would have the effect that two files which were identical at the
beginning for the first x number of blocks (but different afterwards)
would encrypt to the same first x number of blocks.

Matt
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