08.11.2015 13:03, Dimitry Sibiryakov wrote:
 > 08.11.2015 11:58, Vlad Khorsun wrote:
>>      Are you going to say that encryption is useless if algorithm is known ?
>
>     No. How did you read that?

   Only reliable way to validate encryption key is to use it in encryption, for 
example:
encrypt something using correct key and decrypt using key to validate and 
compare results.
Or, encrypt something with correct key and with key to validate and again 
compare results.
Therefore, i failed to see how to "easy to forge a key that pass validation" 
and it would
be not correct key (i.e. not the same as original key).

Regards,
Vlad

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