Arcade machines employ various anti-piracy measures to safeguard their game software from unauthorized copying and tampering. One common method is hardware-based encryption, where the game software is tied to a specific circuit board or security chip, making it difficult to replicate. Another technique involves checksum verification, where the system regularly scans the game ROM for alterations, shutting down if tampering is detected.

Many arcade games also use custom ROMs with unique data formats, preventing standard duplication methods. Physical security measures, such as tamper-proof seals and epoxy-covered chips, further deter hardware modifications. Additionally, some manufacturers implement online verification systems, requiring periodic authentication to prevent unauthorized use.

These layered protections ensure that arcade operators and players experience genuine, unaltered gameplay while discouraging piracy in the competitive arcade industry.