Modulation Symbol Encryption Using Phase and Amplitude Keys
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Solution Overview
Problem
Existing 5G and future 6G communication systems face challenges in securing modulation symbols due to the increasing complexity and connectivity of devices, necessitating enhanced encryption methods to protect data integrity and privacy.
Innovation Solution
A method for encrypting complex-valued modulation symbols using phase and amplitude transformations based on user equipment radio frequency characteristics, involving a sequence-based encryption process that includes phase rotation and amplitude scaling, supported by network nodes and user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional modulation schemes are used without encryption, then communication simplicity is maintained, but data security is compromised
Solution Approach 1:
The patent applies parameter changes by transforming modulation symbols in the complex plane through phase rotation and amplitude scaling. The encryption process modifies the original modulation symbols by changing their phase and amplitude parameters according to encryption sequences, achieving secure transmission without fundamentally altering the communication framework
Solution Approach 2:
The patent introduces encryption sequences as intermediary elements that mediate between the original data and the transmitted modulation symbols. These sequences act as keys that transform the modulation symbols, providing security while maintaining system compatibility. The intermediary sequences enable secure communication without requiring complete system redesign
2Reliability
If encryption is applied to modulation symbols, then data security is enhanced, but processing complexity increases
Solution Approach 1:
The patent segments the encryption process into distinct operations: phase rotation and amplitude scaling. By dividing the encryption function into separate modular operations, the system can process modulation symbols through multiple transformation stages, making the complex encryption process more manageable and implementable in existing communication hardware
Solution Approach 2:
The patent employs dynamic encryption sequences that can vary over time and adapt to different transmission conditions. The encryption sequences are generated dynamically based on system parameters and can be updated without changing the underlying encryption framework, allowing flexible security management while maintaining processing efficiency
3Reliability
If phase and amplitude transformations are applied, then encryption effectiveness is improved, but signal distortion increases
Solution Approach 1:
The patent applies beforehand cushioning by carefully designing the phase rotation and amplitude scaling transformations to compensate for potential signal distortions. The encryption sequences are constructed to ensure that the transformed symbols remain within acceptable decision boundaries, preventing excessive distortion that would compromise signal accuracy at the receiver
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments of the present disclosure provide a method of modulation symbol encryption in a communication system, comprising: obtaining a first sequence for encrypting a complex-valued modulation symbol sequence based on a second sequence, wherein the second sequence is associated with a root key sequence or a secondary key sequence, or with a radio frequency characteristic of a user equipment; encrypting the complex-valued modulation symbol sequence based on the first sequence to obtain an encrypted complex-valued modulation symbol sequence; obtaining a baseband signal based on the encrypted complex-valued modulation symbol sequence.