How to get entropy value of any input file?

Asked May 29 '15 at 20:20

Active May 29 '15 at 20:20

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Are there any built-in methods in C# that calculate entropy or is there some formula I can use? I've looked around, but cannot find anything regarding C# file entropy.

Additional Details:

I have mean, median, mode, and standard deviation of a file, but I'm not sure what to do about the entropy.

If this helps, it is an encrypted file by Shift Cipher (Caesar Cipher) with Z₂₅₆.

asked May 29 '15 at 20:20

Khaltazar

@AlexBell - I don't understand the answer to that question. It doesn't seem to be C#. – Khaltazar May 29 '15 at 20:28
3

@Khaltazar It's pseudo-code. You should be able to extract C# code from it. – Der Kommissar May 29 '15 at 20:30
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I agree with @EBrown: the generic solution is provided, so please write your own C# implementation and bring us your code if there is any problem. Kind regards, – Alexander Bell May 29 '15 at 20:36
"Are there any built-in methods in C# that calculate entropy" - nope. Seems like you already have the formula you can use in the generic solution. – Brendan Hannemann May 29 '15 at 20:44

How to get entropy value of any input file?

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