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How to encrypt a string


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The application is a simply messagebox.

I can use WinHex to open the exe file, and search and replace "HelloWorld" string.

Is there a way to encrypt such string, so that I can not find "HelloWorld" ?

Source code:

#include <windows.h>

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {

MessageBox(NULL, "HelloWorld", "Title", MB_OK);

return 0;


Thanks for helping.

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If you just want to stop a simple text string search then XOR encode each character with a fixed value when you store the character string and XOR decode again when you use it.

This will stop a casual text string search but won't stop any reasonably experienced cracker.


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