Unauthorized firmware modifications in arcade machines can lead to operational issues, security vulnerabilities, and even legal consequences. To safeguard these systems, consider the following effective methods:

1. Use Secure Boot Mechanisms: Implement secure boot protocols to ensure only verified firmware can run on the machine. This prevents unauthorized code from executing.

2. Encrypt Firmware Updates: Encrypt firmware files and require digital signatures for updates. This ensures only authenticated updates are installed.

3. Physical Security Measures: Secure the arcade machine’s hardware with tamper-evident seals or locks to deter physical access to firmware storage.

4. Regular Firmware Audits: Periodically check firmware integrity and compare it against known-good versions to detect unauthorized changes.

5. Network Isolation: Disconnect arcade machines from public networks or use firewalls to block unauthorized remote access attempts.

By combining these strategies, arcade operators can significantly reduce the risk of firmware tampering and maintain system reliability.