how do I get a static value based on two string values in c#?(looking for best practice )

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I am developing an application that requires company login as application loads. For company login, I have used three fields - Company Name, Password and Unlock String. The logic with these fields is; based on company name and password value, unlock string is to be generated. These three values will be given to client and the can login using these values.
I have been looking into a ways by which I can get a string based on two strings. Here using company name and password, a new string is to be generated that I will call unlock code.

What is the best practice for this logic in use in c#, asp.net. i had used RNGCryptoServiceProvider but it always returns dynamic value. I need unlock string to be static based on company name and password.

Any help!!!
Thanks in advance

Posted 19-Sep-15 0:46am

Codes DeCodes

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Patrice T 19-Sep-15 7:30am

In the field of app protection, if you ask 10 programmers, you will end with 11 different methods.

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OriginalGriff · Accepted Answer · 2015-09-19T01:05:00

I'd concatenate the two strings, and then return the hash value of those, as a BASE64 string.

If you use a standard hash - https://msdn.microsoft.com/en-us/library/system.security.cryptography.hashalgorithm%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396[^] has quite a few - such as SHA or even MD5 (though that isn't recommended for new projects) it should be sufficiently unreadable. And if your concatenation is salted with a couple of special characters it won't be "guessable" unless they have your code to play with.