Battery Pack Pairing With Dynamic Verification Code Display
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Solution Overview
Problem
The existing pairing process for electric mobile vehicles with power storage packs and portable terminal devices lacks security, particularly when using stickers with fixed verification codes, as these codes are exposed and cannot be dynamically generated, leading to lower security and potential unauthorized access.
Innovation Solution
An electric mobile vehicle system that includes a controller to obtain a verification code from the power storage pack via wired or wireless communication and a notification unit to present the verification code to the user, allowing for dynamic generation and secure exchange of encryption keys for short-range wireless communication between the power storage pack and portable terminal device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a verification code is displayed on the battery pack to improve pairing security, then security is improved, but device complexity and cost increase due to requiring a display unit
Solution Approach 1:
The verification code display function is extracted from the battery pack and relocated to the portable terminal device. The battery pack only needs to generate and transmit the verification code data, while the terminal device's existing display unit presents the code to the user, eliminating the need for a display on the battery pack itself.
Solution Approach 2:
The portable terminal device acts as an intermediary between the battery pack and the user. It receives the verification code from the battery pack via wireless communication and presents it through its display interface, mediating the interaction without requiring the battery pack to have direct display capabilities.
2Ease of manufacture
If a sticker with a fixed verification code is attached to the battery pack, then ease of manufacture is improved, but security deteriorates because the code is constantly exposed and cannot be dynamically changed
Solution Approach 1:
The verification code transitions from a static, fixed value on a sticker to a dynamic value that is generated and updated electronically. The battery pack can now generate new verification codes on demand, and the code is only displayed temporarily on the portable terminal device during the pairing process, then discarded, making it impossible to be continuously exposed or reused.
Solution Approach 2:
The verification code changes from a fixed parameter (sticker content) to a variable parameter that can be dynamically generated and updated. The system now uses electronically stored and transmitted code values that can be changed between pairing attempts, transforming the security model from static to dynamic.
Data Source
AI summary
In an electric mobile vehicle to which a power storage pack is attached, a controller obtains, from the power storage pack via wired or wireless communication, a verification code that is to be used in a process of exchanging an encryption key that is to be used for short-range wireless communication between the power storage pack and a portable terminal device. A notification unit presents, to a user of the portable terminal device, a tentative notification of the verification code obtained from the power storage pack.