RFID Game Token Coin Tracking for Abnormal Usage Detection
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Solution Overview
Problem
Existing RFID-attached game token coins in casinos fail to track and prevent the use of genuine coins with unusual histories, such as prolonged non-use or improper ownership changes, which can facilitate crimes like money-laundering.
Innovation Solution
Implementing an RFID tag with a data non-rewritable region for constant information and a data rewritable region for variable location information, enabling a management system to track and detect abnormal usage patterns through a writer, reader, and management controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tag memory region is locked after writing to prevent unauthorized rewrite, then security against fake coins is improved, but ability to track usage history is lost
Solution Approach 1:
The RFID tag memory is divided into two distinct regions: a locked memory region for storing constant information (coin value, serial number) that cannot be modified, and an unlocked memory region for storing variable information (usage history, location data) that can be continuously updated. This segmentation allows simultaneous maintenance of security and tracking capabilities.
2Reliability
If RFID tag stores only constant information, then security is improved, but detection of unusual usage patterns becomes impossible
Solution Approach 1:
The memory structure separates constant authentication data from variable usage data, allowing the system to perform both authentication and usage monitoring functions simultaneously without interference.
Solution Approach 2:
The system continuously writes usage information (location, time, owner changes) to the unlocked memory region, creating a feedback loop that enables real-time tracking and analysis of coin usage patterns to detect anomalies.
3Loss of information
If memory region is made rewritable to track location, then usage history tracking is improved, but vulnerability to unauthorized modification increases
Solution Approach 1:
By separating constant and variable information into different memory regions with different access permissions, the system allows rewriting of usage data while protecting core authentication data from modification.
Solution Approach 2:
Different portions of the memory have different quality characteristics: the locked region provides immutable security, while the unlocked region provides flexible tracking, with each region optimized for its specific function.
Data Source
AI summary
In a management system of a game token coin, one RFID tag having a data non-rewritable region and a data rewritable region is imparted to the game token coin. The location relating information of the game token coin is stored in the data rewritable region. The system includes a writer configured to additionally write the location relating information, a reader configured to read the location relating information from a plurality of the game token coins, and a management controller configure to examine the information obtained from the reader. The management controller includes a function that determines whether a history of the location relating information obtained from the reader has no abnormality.