Magic token (authentication request)

When the user successfully connects to the server, the user's machine XORs the debug token and 1129076036. For example, 0x434c5544, ASCII code of “CLUD,” to get the magic token. It then sends a single line of this magic token to the server as an authentication request. The server checks its correctness. If it is in error, then the connection is immediately closed.

For example, with a debug token 858680469, the magic token is 1885485521 because 858680469 XOR 1129076036 = 1885485521.