Encrypted Beacon Authentication in Wireless Power Transfer
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Solution Overview
Problem
Conventional wireless power transmission systems face security and reliability issues due to the vulnerability of beacon signals to spoofing and jamming, leading to unauthorized power delivery to non-authorized devices.
Innovation Solution
Implementing an encryption scheme for beacon signals, where the power receiver selects and encrypts a unique beacon, which is then transmitted to the power transmitter for authentication, ensuring only authorized devices receive power by using an agreed encryption mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional beacon signals are used for device identification, then the system is simple and easy to operate, but the system becomes vulnerable to spoofing and jamming attacks
Solution Approach 1:
The patent applies preliminary action by pre-establishing an encryption scheme between the power transmitter and power receiver before beacon transmission. The encryption keys and algorithms are configured in advance, allowing the beacon signal to be encrypted and authenticated without real-time negotiation, thus preventing spoofing and jamming attacks while maintaining system reliability.
Solution Approach 2:
The patent introduces an encryption mechanism as an intermediary layer between the beacon signal and the authentication process. This intermediary encrypts the beacon signal using predetermined keys, adding a security layer that prevents direct manipulation or spoofing of the beacon while maintaining the overall system structure.
2Reliability
If encryption is applied to beacon signals, then security against spoofing and jamming is improved, but the complexity of the authentication process increases
Solution Approach 1:
The patent implements self-service by enabling the power receiver to autonomously encrypt its own beacon signal using predetermined encryption keys stored locally. The power transmitter similarly autonomously decrypts and authenticates the received beacon without requiring external intervention or complex multi-party negotiation, thus enhancing security while maintaining operational simplicity.
Solution Approach 2:
The encryption keys and algorithms are configured in advance during system initialization or device provisioning. This preliminary setup eliminates the need for complex real-time key exchange or authentication negotiation, allowing the authentication process to proceed smoothly with simple encrypt/decrypt operations.
3Reliability
If unique encrypted beacons are used for each device, then unauthorized access is prevented, but the system requires more complex key management
Solution Approach 1:
The patent applies segmentation by dividing the authentication system into distinct components: the power transmitter holds one set of encryption keys, while each power receiver holds its own unique encryption keys. This segmentation allows each device to independently manage its own authentication credentials, ensuring that compromise of one device's keys does not affect the security of other devices in the system.
Solution Approach 2:
Each power receiver independently manages its own encryption keys and performs self-authentication by encrypting its beacon signal with its unique keys. This self-service approach eliminates the need for a centralized key management system, reducing overall system complexity while maintaining strong device authorization through unique encrypted beacons.
Data Source
AI summary
A method is implemented by a power receiver for authentication with a power transmitter. The method can include selecting, by the power receiver, a beacon from an encryption scheme. The power receiver can further encrypt the beacon to generate an encrypted beacon signal and transmit the encrypted beacon signal to the power transmitter to cause the authentication with the power transmitter. In turn, the power receiver can receive power from the power transmitter after the authentication.