Mobile Phone Vehicle Pairing via NFC Authentication
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Solution Overview
Problem
Existing vehicle key systems lack secure contactless locking/unlocking and starting mechanisms that prevent unauthorized access and piracy, while ensuring user convenience and security.
Innovation Solution
A method for pairing a mobile telephone with a motor vehicle using NFC protocol for secure contactless locking/unlocking and starting, involving an encrypted authentication code managed by the mobile phone, which decrypts and communicates with the vehicle's key to authenticate and authorize access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NFC protocol is used for contactless communication between mobile phone and vehicle, then user convenience and ease of operation are improved, but security against unauthorized access and piracy may deteriorate
Solution Approach 1:
The authentication code is divided into multiple parts: an encrypted first part stored in the mobile phone and a second part stored in the vehicle. Both parts are required for successful authentication, preventing unauthorized access even if one part is compromised. This segmentation ensures that contactless operation remains convenient while security is maintained through multi-factor authentication.
Solution Approach 2:
An encrypted authentication code acts as an intermediary between the mobile phone and vehicle communication interfaces. The encryption layer mediates the NFC communication, allowing convenient contactless operation while preventing unauthorized access. The intermediary encryption mechanism ensures that the communication remains secure despite the contactless nature of NFC.
2Reliability
If encrypted authentication code is stored in mobile phone memory, then security against piracy is improved, but device complexity increases
Solution Approach 1:
Instead of storing only the authentication code, the system stores an encrypted copy of the authentication code in the mobile phone. The encryption key is derived from the NFC communication interface, creating a secure copy that can be used for authentication without exposing the original code. This copying approach enhances security while keeping the implementation relatively simple.
Solution Approach 2:
The authentication code is transformed through encryption before storage in mobile phone memory. By changing the parameter state from plaintext to encrypted form, the system achieves higher security. The encryption/decryption process adds computational steps but maintains a relatively simple overall architecture by using standard cryptographic algorithms.
Data Source
Figure 1
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AI summary
The invention relates to a method for pairing a mobile telephone with a motor vehicle, said paired mobile telephone being used to lock/unlock and/or start said motor vehicle by means of at least part of an authentication code. Said method is characterized in that the mobile telephone (5) is loaded with said at least part of the authentication code required to be able to lock/unlock and/or start said motor vehicle.