TPMS Authenticated Pairing for Secure Auto-Learning Sensors
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Solution Overview
Problem
The challenge of securely pairing a Tire Pressure Monitoring System (TPMS) with a vehicle using wireless technologies like Bluetooth, as existing methods require user interaction and are not feasible for auto-learning TPMS sensors.
Innovation Solution
A protocol for two-way TPMS learning and authenticated pairing that involves generating a test value and corresponding pairing PIN using a random value and pre-shared key, allowing for secure and auto-learning pairing without user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless pairing protocols require user interaction for authentication, then security is improved, but ease of operation deteriorates because auto-learning TPMS sensors cannot be paired automatically
Solution Approach 1:
The TPMS sensor performs self-service by autonomously generating advertising packets containing test values and completing the pairing process without requiring user interaction. The sensor independently initiates connections, transmits authentication data, and establishes secure communication channels, enabling automatic pairing while maintaining security through cryptographic verification.
Solution Approach 2:
The pairing authentication data (test values and cryptographic keys) is pre-configured in the TPMS sensor during manufacturing. This preliminary preparation allows the sensor to immediately authenticate with the vehicle without requiring real-time user input, resolving the contradiction between security requirements and automatic operation capability.
2Ease of operation
If traditional pairing methods are used, then user control over pairing is improved, but productivity deteriorates due to manual intervention requirements
Solution Approach 1:
The patent replaces manual mechanical pairing operations with automated electronic authentication. The vehicle controller automatically receives advertising packets from TPMS sensors, verifies cryptographic test values, and completes pairing without human intervention. This substitution maintains security controls while dramatically improving pairing speed and productivity.
3Reliability
If secure authentication protocols are implemented, then reliability is improved, but device complexity increases due to additional cryptographic operations
Solution Approach 1:
The patent extracts the complex cryptographic authentication operations from the vehicle controller and places them in the TPMS sensor, which already contains embedded security credentials. The sensor independently performs test value generation and verification, reducing the computational burden on the vehicle controller and distributing complexity to where security credentials already exist.
Data Source
AI summary
Systems and methods for implementing two-way tire pressure monitoring system (TPMS) learning and authenticated pairing. A random value may be used to determine a test value and a pairing PIN by use of a HMAC (Hash-based Message Authentication Code) function and a pre-shared key that is accessible to a TPMS sensor and a vehicle (e.g., controller system thereof). The random value and test value may be broadcasted by the TPMS sensor and received by the vehicle. The vehicle may calculate the pairing PIN using the random value and the pre-shared key.