Secure RF Communication Using Magnetic Channel Data Encryption
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Solution Overview
Problem
Current RF communication systems for mobile terminals lack adequate security measures, allowing attackers to intercept and decode data transactions due to the absence of encryption, thereby compromising the security of RF link data exchanges.
Innovation Solution
Implementing a secure RF communication method that generates and uses magnetic channel data for encryption and decryption of RF data, establishing a secure RF link by calculating channel parameters and using these parameters to encrypt and decrypt data transmitted between devices, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RF communication is implemented for mobile terminal electronic payments, then data exchange speed and convenience are improved, but security vulnerability increases due to lack of encryption
Solution Approach 1:
The patent applies preliminary action by pre-establishing magnetic channel data through magnetic coupling before RF communication occurs. This magnetic channel data serves as a pre-shared secret that enables subsequent encryption of RF data, preventing attackers from intercepting or decoding transactions even though RF communication itself is not encrypted.
Solution Approach 2:
The patent introduces magnetic channel data as an intermediary element that mediates between the RF communication channel and security requirements. The magnetic channel data, transmitted through a different physical channel (magnetic coupling), acts as a key that protects the RF communication data without being part of the RF channel itself, thus securing the vulnerable RF link.
2Reliability
If magnetic channel data is used for encryption, then security against RF attacks is improved, but system complexity increases due to additional encryption/decryption processes
Solution Approach 1:
The patent extracts the security function from the RF communication channel itself and places it in a separate magnetic channel. By taking out the key generation and exchange process from the vulnerable RF channel and performing it through magnetic coupling, the system adds security without significantly complicating the RF communication flow. The magnetic channel data is obtained once and then used for encryption.
Solution Approach 2:
The system applies self-service by having the terminal device itself generate and manage the magnetic channel data for its own encryption needs. The terminal autonomously performs encryption using the magnetic channel data without requiring external key management infrastructure, reducing overall system complexity while maintaining security.
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
Enhances the security of RF link data exchanges by ensuring that even if an attacker attempts to fake a connection, they cannot complete the encryption or decryption process without the magnetic channel data, thus preventing substantive transaction attacks and reducing security maintenance complexity.
Implementation Method 1
a magnetic signal generator module (11), configured to generate magnetic channel data and transmit the magnetic channel data via a magnetic channel
Implementation Method 2
an RF transceiver module (12), configured to establish a radio frequency link with a second terminal, transmit encrypted first RF data to the second terminal via the radio frequency link, and receive encrypted second RF data transmitted by the second terminal via the radio frequency link
Data Source
AI summary
A method, terminal and secure RF communication system are provided. The method for radio frequency secure communication of the invention comprises: generating magnetic channel data, and transmitting the magnetic channel data via a magnetic channel; establishing a radio frequency link with a peer device which feeds back a response information of the magnetic channel data; generating first radio frequency data, encrypting the first radio frequency data using the magnetic channel data, and transmitting the encrypted first radio frequency data to the peer device via the radio frequency link; and/or receiving encrypted second radio frequency data transmitted by the peer device via the radio frequency link, and decrypting the encrypted second radio frequency data using the magnetic channel data. By the above technical solution, the invention avoids the risk that a preset key is intercepted or decrypted, and enhances the security of the radio frequency link data exchanging process.