Serverside Keyauth

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

I would recommend to use asio instead of native sockets

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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

Building

Prerequisites:

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

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Building the server:

Clone the repository and create a build folder

cd build
cmake ..
cmake --build .

Now you can execute server

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Building the client:

Open the solution and click Build -> Rebuild Solution

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Example output

Client:

Server: