Context-Based Pairing Using Motion Fingerprint Signals
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Solution Overview
Problem
Existing pairing technologies for devices like IVI systems in vehicles are inconvenient, time-consuming, and vulnerable to security threats, especially when users attempt to pair devices while driving, due to the need for manual pin input and potential external attacks.
Innovation Solution
A context-based pairing apparatus that uses a position measurer, such as an accelerometer, to measure changes in moving and vertical directions, generating a secret key for secure pairing through dynamic time warping and bit sequence extraction from fingerprint signals, enhancing security and reducing user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual pin input is required for pairing, then security can be maintained, but pairing becomes time-consuming and inconvenient
Solution Approach 1:
The system pre-generates and stores multiple PIN codes in the IVI system before pairing occurs. When a pairing request is received, the system automatically selects and uses one of the pre-generated PINs without requiring user input, thus maintaining security while eliminating the time-consuming manual entry process
Solution Approach 2:
The pairing system performs automatic PIN selection and pairing execution without requiring user intervention. The system autonomously completes the pairing process by selecting from pre-generated PINs and executing the connection, making the system serve itself rather than requiring manual user operation
2Ease of operation
If pre-consulted pin is re-used for pairing, then pairing convenience is improved, but vulnerability to attacks increases
Solution Approach 1:
Instead of using a single reusable PIN, the system generates and stores multiple PIN codes (first PIN, second PIN, etc.). Each PIN can be used once for pairing, and when exhaustion of available PINs is detected, the system generates a new set of PINs. This segmentation of the authentication credential into multiple single-use PINs maintains convenience while reducing attack vulnerability
Solution Approach 2:
The system dynamically changes the PIN parameter by generating new PIN codes when existing ones are exhausted or compromised. The PIN generation function creates new cryptographic credentials, changing the authentication parameter from static reusable PIN to dynamic single-use PINs, thereby maintaining convenience while improving security against attacks
3Reliability
If multiple pairing steps are required for device verification, then security is enhanced, but user friendliness deteriorates
Solution Approach 1:
The system extracts the manual verification steps from the pairing process by implementing automatic device verification through pre-generated PINs. The complex verification steps that previously required user attention are taken out and handled automatically by the system, maintaining security verification while improving user friendliness
Solution Approach 2:
The pre-generated PIN acts as an intermediary that automates the verification process. Instead of requiring users to manually verify devices through multiple steps, the system uses the pre-generated PIN as a mediator to automatically complete verification, maintaining security while eliminating the need for complex user interaction
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure, efficient, and user-friendly pairing of in-vehicle devices by leveraging position changes to generate a secret key, thereby improving security and reducing the risk of external attacks during the pairing process.
Implementation Method 1
the position measurer may include an accelerometer for measuring a position change of a moving direction which is the first direction and a position change of second direction which is perpendicular to the first direction and which is a vertical direction
Data Source
AI summary
A pairing apparatus according to exemplary embodiments of the present invention comprises a position measurer for measuring position changes of a first direction and a second direction; and a processor for generating a secret key using the measured position change of the first direction and the measured position change of the second direction and performing a pairing with a pairing target apparatus using the secret key.