How to encrypt c# code so that it wont be easy to decompile and read

Question

We are planning to secure our application so that it will be impossible to decompile by other programmer. I know there are tools out there that can decompile a dll and exe like JetBrains dotPeek. Is there a tool or procedure that can make this possible.

You will want to look into ".NET obfuscation". There are many StackOverflow questions relating to this topic. http://stackoverflow.com/questions/tagged/obfuscation — Jason Evans, Sep 23 '13 at 09:53
This question might be interesting: http://stackoverflow.com/questions/2525/net-obfuscation-tools-strategy — Thorsten Dittmar, Sep 23 '13 at 09:53
You can do more than just obfuscating to make it harder to decompile. Look at my ans — smerlung, Sep 23 '13 at 09:59

score 6 · Answer 1 · answered Sep 23 '13 at 09:53

It is impossible to make your code impossible to decompile.

Additionally, there's no such thing as "encrypting" a .NET assembly (or any binary) while still maintaining its ability to be executable.

What you're looking for is an obfuscator - a tool that mangles the code enough to make it harder for a human reader to understand. There is one called Dotfuscator.

score 0 · Answer 2 · answered Sep 23 '13 at 09:52

0

I use .NET Reactor which works very well. It does more than just obfuscating.

answered Sep 23 '13 at 09:52

smerlung

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Thanks smerlung i currently downloading .Net Reactor it seems its free – Jervie Vitriolo Sep 23 '13 at 10:02
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it's a paid software – Lenor Apr 13 '20 at 14:29

How to encrypt c# code so that it wont be easy to decompile and read

2 Answers2