Wireless Power Receiver Authentication via Timed ECDH Link Setup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmission systems lack secure, authenticated communication links, particularly for devices without user input interfaces, leading to potential security risks and unauthenticated connections.
Innovation Solution
Implementing a timing-based authenticated link procedure using the Elliptic Curve Diffie-Hellman (ECDH) public key exchange method for wireless power transmitters and receivers, enabling secure communication without requiring display or keyboard input functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-band communication is used for wireless power transmission, then power transfer is achieved, but communication security and authentication are insufficient
Solution Approach 1:
The patent combines in-band communication (for power transfer) with out-of-band communication (for authentication and data exchange) into a unified wireless power transmission system. This merging allows the system to leverage the strengths of both communication methods: in-band for power delivery and out-of-band for secure, high-speed data exchange and authentication, thereby improving communication security without requiring completely separate systems.
Solution Approach 2:
The patent implements a dual-communication architecture where the wireless power transmission system simultaneously performs multiple functions: power transfer via in-band communication and authentication/data exchange via out-of-band communication. This multi-functionality allows a single system to handle both energy transmission and secure communication protocols, improving reliability while managing complexity through integrated design.
2Speed
If out-of-band communication is added for secure data exchange, then communication speed and security improve, but device complexity increases
Solution Approach 1:
The patent segments the communication functions into distinct channels: in-band communication handles power transfer while out-of-band communication handles authentication and data exchange. This segmentation allows each communication channel to be optimized for its specific purpose, enabling high-speed secure data transmission through out-of-band channels without compromising the power transfer function, while managing overall system complexity through clear functional separation.
3Reliability
If authentication procedures are implemented, then security against unauthorized access improves, but connection establishment time increases
Solution Approach 1:
The patent performs authentication procedures through out-of-band communication before initiating power transfer via in-band communication. By completing the authentication and device identification processes in advance using the faster out-of-band channel, the system ensures security requirements are met before power transmission begins, thereby minimizing the time loss associated with authentication while maintaining strong security measures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Establishes secure, authenticated links between wireless power transmitters and receivers, preventing unauthorized access and ensuring secure data transmission, even for devices without user interfaces.
Implementation Method 1
a power pickup circuit configured to form magnetic coupling with the wireless power transmitter to receive wireless power from the wireless power transmitter
Data Source
AI summary
According to one aspect of the present invention, a wireless power reception device includes: a power pickup circuit configured to form a magnetic coupling with a wireless power transmission device to receive wireless power from the wireless power transmission device; and a communication/control circuit configured to perform transmission control for the wireless power and at least one of data transmission and reception on the basis of communication with the wireless power transmission device, wherein the communication/control circuit can initiate a process for generating an authenticated link for charging by accepting only a connection request received within a prescribed authentication accept period.