Wireless Charging Key Verification via Processor Pass-Through
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Solution Overview
Problem
The existing wireless charging security key verification method is vulnerable to key leakage during supplier cooperation, as the security key is stored in firmware and cannot be modified, leading to significant risks and management challenges.
Innovation Solution
A security key verification method that synchronizes the security key to the processor of the apparatus to be charged, enabling pass-through verification between the wireless charging device and the processor, eliminating the need for the wireless charging receiver to store any security key and allowing for quick key management and leakage control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the security key is stored in firmware for verification during wireless charging authentication, then the verification process can be completed inside firmware with high confidentiality, but the security key cannot be modified and is vulnerable to leakage during supplier cooperation
Solution Approach 1:
The patent extracts the security key from the firmware storage location and relocates it to the processor's internal memory. This allows the verification process to remain within firmware while enabling the security key to be dynamically managed by the processor, thus resolving the contradiction between verification reliability and management flexibility
Solution Approach 2:
The patent introduces dynamic management capabilities for the security key, allowing it to be added, modified, or removed by the processor based on different scenarios. This transforms the static firmware-stored key into a dynamic key that can be flexibly managed while maintaining verification reliability
2Reliability
If the security key is kept by a special person with high level of confidentiality, then the security key confidentiality is maintained, but it is not easy to manage and control during supplier cooperation
Solution Approach 1:
The patent enables the processor to autonomously manage the security key through self-service mechanisms. The processor can independently add, remove, or modify security keys based on authentication results and cooperation scenarios, eliminating the need for manual key management by special persons while maintaining confidentiality
Solution Approach 2:
The patent introduces the processor as an intermediary between the security key and the firmware verification process. The processor acts as a mediator that securely handles key distribution and management during supplier cooperation, maintaining confidentiality while improving manageability
3Adaptability or versatility
If the security key is provided to suppliers for cooperation, then wireless charger chip and receiver chip suppliers can implement verification, but once the security key is leaked, there is a great risk
Solution Approach 1:
The patent implements preliminary action by establishing scenario-based key management mechanisms before supplier cooperation begins. Different security keys are pre-configured for different cooperation scenarios, and the processor selectively applies appropriate keys based on authentication results, reducing the risk of widespread key leakage
Solution Approach 2:
The patent segments the security key management into different scenarios and suppliers. Each supplier or cooperation scenario has its own dedicated security key or key set, isolated from others. This segmentation ensures that if one key is leaked, it only affects the specific scenario or supplier, not the entire system
Data Source
AI summary
A security key verification method for wireless charging includes: acquiring a security key of a wireless charging device and synchronizing the security key to a processor of an apparatus to be charged; and in response to the wireless charging device sending a security key verification request to a wireless charging receiver of the apparatus to be charged, transmitting the security key verification request via pass-through from the wireless charging receiver to the processor of the apparatus to be charged, and verifying the security key between the processor of the apparatus to be charged and the wireless charging device.