How to decompile exe file?

Y

Yuri Yurin-Komarov2015-12-21 21:08:59

reverse engineering

Yuri Yurin-Komarov, 2015-12-21 21:08:59

Good day!
There is an exe file . The point is the following. The program (logo) starts, then the activation window appears. After entering the key, the data is sent to the company's server, where the key is verified. When entering the key, the correctness of the entered data is checked. Here you need to pull out how (what algorithm) the key is checked and what appearance it should have.
My attempts with IDA Pro were not particularly successful. Can anyone help or at least point me in the right direction.
Sincerely, Me!

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V

Vladimir Martyanov, 2015-12-21
@vilgeforce

Help in bypassing protection - to freelancers.