NFC Data Encryption Using Dual Diagonal Matrix Encoding
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Solution Overview
Problem
Near field communication systems face security vulnerabilities due to open wireless communication channels, making it difficult to detect and prevent unauthorized data access and wiretapping.
Innovation Solution
The implementation of an error correcting code-based encryption method that uses a dual diagonal matrix for encoding and decoding, ensuring only the predetermined reception terminal can successfully reconstruct the data, while a wiretap terminal fails to do so, thereby enhancing security and processing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data is transmitted over wireless communication channel in NFC system, then communication speed and convenience are improved, but security vulnerability increases due to open channel access
Solution Approach 1:
The encryption scheme segments the transmitted signal into multiple components using orthogonal sequences. Each component carries portions of the data in a structured manner, allowing the legitimate receiver to reconstruct the original data while making it difficult for unauthorized receivers to extract meaningful information from individual components
Solution Approach 2:
The patent applies different orthogonal sequences to different parts of the transmitted signal. Each sequence has specific correlation properties that are locally optimized for the legitimate receiver's channel conditions, creating a security gap where only the intended receiver can successfully decode the data
2Reliability
If error correcting code is applied to encrypted data, then reliability of data transmission is improved, but processing complexity increases
Solution Approach 1:
The patent combines the encryption process with error correction coding in a unified scheme. The orthogonal sequences used for encryption also serve as spreading codes that provide inherent error protection, eliminating the need for separate encryption and error correction stages and reducing overall processing complexity
3Object-affected harmful factors
If orthogonal sequence based encryption is used, then security against wiretapping is improved, but difficulty in detecting and resolving threats increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the receiver monitors the quality of received signals and adjusts decoding parameters accordingly. This feedback loop enables the system to detect potential security threats by analyzing correlation metrics and adjusting the orthogonal sequence matching to maintain security while adapting to changing channel conditions
Data Source
AI summary
A method for encrypting data in a near field communication system is provided. The method includes generating encrypted data based on first data input in a current state and second data input in a state immediately preceding the current state, and encoding the encrypted data through a predetermined error correcting code.