To check the compliance of Secret Code to Open Code, user trasmits the both Codes to a public web-site with available source code. The web-site performs two simple operatios:
- Calculating Hash function of the Secret Code;
- Calculating byte-by-byte difference between the Hash function value and the Open Code.
If and only if the Secret Code corresponds to the Open Code, all bytes of the difference equal zero.
On the public web-site, the user can also make sure that only the original Secret Code complies to the original Open Code. To do that, the user changes any character(-s) in the Secret_Code input field and observes that the resulting byte-to-byte difference contains non-zero bytes.