SteamStub DRM

Examples with SteamStub DRM

When a game developer uses SteamStub DRM, it is integrated into the game's executable file. The originally executable game file is encrypted, embedded in a code layer (wrapper) and provided with a unique value that is unique for each copy of the game. When a user purchases the game on Steam, the encrypted executable file is downloaded and installed on their computer.

When users start the respective game, SteamStub checks whether users have a valid Steam account and whether the product was purchased via Steam. If the requirements are met, the executable file is decrypted and the game can be started.

If unauthorized changes to the game files are detected, the respective game start is prevented. SteamStub includes several measures to prevent manipulation of game files, including:

1. File checksums: SteamStub calculates and stores checksums for each file in the game. When the game starts, SteamStub checks the checksums to make sure the files have not been changed.
2. Code obfuscation: SteamStub can obfuscate the game's code to make it more difficult for attackers to analyze and modify the game files
3. Encryption: As mentioned earlier, SteamStub encrypts the game's executable file, making it difficult for attackers to access and modify the code
4. Anti-debugging techniques: SteamStub contains anti-debugging measures that prevent attackers from attaching a debugger to the game process and analyzing the code
5. Virtualization: In some cases, SteamStub can use virtualization to execute parts of the game code in a "sandbox," making it difficult for attackers to manipulate the code

Overall, SteamStub is designed as an effective and unobtrusive DRM solution for game developers who want to protect their games from piracy. However, like any DRM technology, it is not perfect and can sometimes cause problems for legitimate users, such as compatibility issues with certain operating systems or hardware configurations.

Further information can be obtained from the Steamworks-Dokumentation  .