Card-head and wire-tap point stealing are two of the most technically sophisticated methods used to steal credits from arcade machines. Both methods involve physically connecting a device to the machine’s internal communication bus — the wiring that carries data between the main board and its peripherals. The device either intercepts credit data (card-head) or injects false data (wire-tap) to steal value from the machine.
Card-Head Point Stealing
A card-head device is a small module that connects to the machine’s communication bus — typically a JAMMA harness or serial connection. The device “reads” the data flowing between the board and its peripherals. When it detects a credit event — a coin being accepted, a payout being triggered — it records the data pattern. The cheater later retrieves the device and analyzes the recorded data to understand the machine’s credit protocol.
Some advanced card-head devices can also inject data. After recording the credit protocol, the device can replay it — generating fake credit events that the machine accepts as legitimate. The device essentially learns how to create free credits by watching how real credits are created.
Wire-Tap Point Stealing
A wire-tap device is simpler than a card-head. It connects to a specific wire on the communication bus — typically the coin mech pulse line or the payout trigger line. The device sends electrical pulses down this wire, mimicking the signals that would be generated by a real coin insertion or a real payout event. The machine cannot distinguish between the tap’s signal and its own peripherals’ signals.
How Anti-Cheat Devices Detect Card-Head and Wire-Tap Attacks
The Gen2 anti-cheat device detects both methods by monitoring the electrical characteristics of the communication bus. A card-head device changes the bus’s impedance — the resistance to electrical current — because it draws power from the bus. A wire-tap device changes the signal timing and voltage on the tapped wire. The Gen2 continuously measures these characteristics and alerts when an anomaly is detected.
If your game machine is showing signs of card-head or wire-tap point stealing, send me a message with your machine model and a photo of your setup. I will do a quick remote check for free. Every device comes with a money-back guarantee, official invoice, express shipping, and 1-on-1 technical support.
WhatsApp / WeChat / Phone: +86 158 1582 1587 — Engineer Wang
To discuss the best anti-cheat strategy for your specific arcade setup, message me directly. I offer a free remote diagnostic session.
Frequently Asked Questions
Q: How do I know if a card-head device is installed on my machine?
A: Physical inspection is the best detection method for card-head devices. They are small circuit boards attached to the wiring harness. The Gen2 device provides continuous electronic monitoring between inspections.
Q: Can a card-head device be detected if it is not currently recording?
A: A card-head device that is not recording draws minimal power but still changes the bus impedance. The Gen2 can detect it through impedance monitoring.
Q: Are card-head devices more common on certain machine types?
A: Card-head devices are most commonly found on fish tables and ticket redemption machines where the communication bus carries credit and payout data in a structured format.
Q: How long does it take to install the Gen2 device to protect against wire-tap attacks?
A: The Gen2 device installs in under 30 minutes and begins protecting against wire-tap attacks immediately.