Arcade machine software employs various anti-exploit measures to prevent cheating and ensure fair gameplay. One common method is code encryption, which scrambles the game's code to make it harder to tamper with. Checksum verification is another technique, where the software checks for unauthorized modifications by comparing data to a known valid state. Hardware locks or dongles can physically restrict access to the software, requiring specific hardware to run the game. Memory protection mechanisms prevent players from altering game data stored in RAM, while obfuscation techniques make reverse-engineering the code more difficult. These measures collectively help maintain the integrity of arcade games and protect against exploits.