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Thread: How to protect .dll?

  1. #1

    Thread Starter
    Fanatic Member
    Join Date
    Nov 2003

    How to protect .dll?


    I'm developing a class lib (C#, Netcore 3.1) that especially I develop for a project, is there any way to protect my .dll so the other would not able to see the methods and properties inside the lib? and the lib must only be used for that project.

    need advice.


  2. #2
    King of sapila
    Join Date
    Oct 2006

    Re: How to protect .dll?

    Yes there is. You can use a program to obfuscate the dll.
    Google: .net obfuscator
    Having said that I'm not sure how well a free obfuscator works.
    Also, especially because you are using, why bother? The dll would be on the server and only server users have access on that. So possibly an admin and you?
    And on top of that, I think that you have been here long to see high rep members NOT using any protection method. It's tricky and, honestly if you are not pioneering on the code, probably hackers won't bother opening your dll.
    We are in part of a huge UK based company and any software they send us, I can open the dll. So it makes you wonder why they don't lock em, non?

  3. #3
    PowerPoster techgnome's Avatar
    Join Date
    May 2002

    Re: How to protect .dll?

    Also, I think the obfuscater only obfuscates internal code... but not the public methods or properties. Those would remain as they are and public to the DLL.

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  4. #4
    Junior Member
    Join Date
    May 2020

    Re: How to protect .dll?

    You use Delphi to write DLL API or DLL COM is better security than C#

  5. #5
    PowerPoster Arnoutdv's Avatar
    Join Date
    Oct 2013

    Re: How to protect .dll?

    I think it's not about decompiling, but not allowing others to see the properties and methods and thus use the DLL from other products.

    You can always add a handshake property/method to the DLL.
    If the handshake is correct then proceed when the properties/methods are called.

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