Cryptographic Battery Authentication via Key Segmentation
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Solution Overview
Problem
Electronic devices face challenges in safely and effectively recognizing and interacting with replacement batteries that may not meet original specifications, posing safety hazards and performance issues.
Innovation Solution
The implementation of a cryptographic battery recognition system using public and private keys for secure communication between the device and battery, where encrypted messages are exchanged to verify the battery's authenticity, ensuring only recognized batteries can provide or receive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cryptographic authentication system is implemented using public and private keys, then battery recognition security and reliability are improved, but device complexity increases
Solution Approach 1:
The authentication system is segmented into two separate cryptographic components: a public key stored in the electronic device and a private key stored in the battery. This segmentation allows the authentication function to be distributed across two independent elements, improving reliability through cryptographic verification while managing complexity by dividing the authentication burden between device and battery rather than concentrating all cryptographic functions in one location.
2Reliability
If encrypted message exchange is used for battery verification, then product integrity and safety are improved, but communication overhead and processing time increase
Solution Approach 1:
The cryptographic keys are pre-configured in the device and battery before authentication is needed. The public key is pre-stored in the device and the private key is pre-stored in the battery during manufacturing. This preliminary action eliminates the need for complex key exchange protocols during authentication, reducing processing time while maintaining strong security through the pre-established cryptographic relationship.
Solution Approach 2:
The authentication system uses cryptographic copies of keys rather than requiring physical or direct verification. The public key serves as a verifiable copy that can be exchanged and used for authentication without exposing the private key, enabling secure verification through information copying rather than physical inspection or complex real-time challenges.
Data Source
AI summary
Improved handling of battery recognition tasks in an electronic device such as a cell phone, smart phone, computer system, recording device or others is facilitated. Recognition of a battery so as to enable exchange of power between the device and the battery is determined by a match between one of a plurality of number strings stored in the device and the decrypted response to an encrypted challenge derived from the one of stored number string.