Serverside Keyauth

This is way more secure than client side authentication if you implement it correctly and do some extra steps.

How to implement this correctly?

  • Encrypt the packets
  • Make the packets invalid after being used once
  • Handle key parts of the application from the server (just like I sent the parameters for MessageBoxA in the example) so a cracker cannot just jump to a function in order to bypass the authentication



  • A Linux server with the latest stable CMake and g++ installed
  • A Windows machine with Visual Studio installed

Building the server:

Clone the repository and create a build folder

cd build
cmake ..
cmake --build .

Now you can execute server

Building the client:

Open the solution and click Build -> Rebuild Solution

Example output




View Github