Vehicle Key Distribution via Scannable Image
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Solution Overview
Problem
Current secure communication technologies between vehicles and mobile devices face challenges in securely distributing cryptographic keys, particularly in ensuring the authenticity and confidentiality of communications, especially when relying on public key infrastructure and digital certificates.
Innovation Solution
A method is introduced where a cryptographic key pair is generated, with a scannable image based on the second cryptographic key being provided to the vehicle for display, allowing the mobile device to scan and extract the key, enabling secure communication by using the first key to decipher messages signed with the second key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional public key infrastructure with digital certificates is used for secure communication, then authentication and confidentiality are enabled, but the complexity of key distribution and authentication processes increases
Solution Approach 1:
The patent uses a scannable image (visual copy) of the cryptographic key as an alternative to traditional digital certificate distribution. The scannable image contains the public key information in a visually accessible format that can be easily captured and transferred, eliminating the need for complex certificate authority infrastructure while maintaining security.
Solution Approach 2:
The patent replaces the mechanical/protocol-based certificate verification process with an optical scanning mechanism. Instead of requiring software-based certificate chain validation, the system uses a mobile device camera to scan and extract the public key from a visual image, simplifying the authentication process.
2Reliability
If cryptographic keys are distributed through traditional channels, then secure communication is established, but vulnerability to malicious attacks and key interception increases
Solution Approach 1:
The patent introduces a scannable image as an intermediary carrier for the cryptographic key. This visual intermediary allows the public key to be transmitted without direct electronic transmission, making it resistant to network-based attacks and interception while still enabling secure key distribution.
Solution Approach 2:
The cryptographic key is pre-encoded into a scannable image format before distribution. This preliminary preparation allows the key to be securely embedded in a visual format that can be displayed and scanned, ensuring the key is ready for secure transmission before the actual communication takes place.
3Reliability
If digital certificates are used for authentication, then entity verification is enabled, but the time required for certificate verification and key exchange increases
Solution Approach 1:
The patent extracts only the essential public key information from the complete digital certificate structure and encodes it into a scannable image. This extraction eliminates the need for full certificate validation and chain verification, reducing authentication time while maintaining the ability to verify entity identity through the public key.
Data Source
AI summary
A system and method for securely providing a mobile device with a cryptographic key in a vehicle. The method includes generating a cryptographic key pair that includes a first and second cryptographic keys. One of the keys is used to create a scannable image which is then incorporated into a label that is displayed in the vehicle, either as a physical label mounted in the vehicle or via a display screen within the vehicle. The label containing the scannable image can then be read by a mobile device at the vehicle, thereby providing the one key to the mobile device for use in sending communications to the vehicle.