Secret-Key Channel Coding for Secure Error-Correcting Transmission
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Solution Overview
Problem
Existing channel encoding methods lack effective security measures to prevent unauthorized access and ensure error detection and correction, particularly in noisy transmission channels.
Innovation Solution
A method for channel coding data that incorporates a secret key to parameterize the encoding process, adding redundancy and encryption, using block and stream encoders, puncturing, and symbol permutation to enhance security and maintain error detection/correction capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel coding adds redundancy for error detection and correction, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by using a secret key to dynamically parameterize the channel coding process. The secret key determines specific coding parameters such as generator polynomials in CRC coding or parity-check matrices in linear block coding. This allows the system to maintain high reliability through redundancy while managing complexity through parameterized standardized coding schemes rather than custom complex algorithms.
2Object-affected harmful factors
If a secret key is used to parameterize channel coding for security, then security is improved, but device complexity increases
Solution Approach 1:
The patent merges channel coding and encryption functions by using the same secret key to parameterize both the error correction coding and the encryption process. This combination provides both security and reliability functions in an integrated manner, preventing unauthorized access while maintaining error detection and correction capabilities, without requiring completely separate complex systems.
Solution Approach 2:
The secret key serves multiple functions simultaneously: it parameterizes the channel coding for error correction, parameterizes the encryption for security, and potentially controls puncturing patterns. This multi-functionality reduces the need for separate dedicated systems for each function, managing overall complexity while achieving multiple security and reliability goals.
3Reliability
If redundancy is added for error correction, then reliability is improved, but loss of information increases due to reduced payload efficiency
Solution Approach 1:
The patent applies partial action through puncturing, where not all redundancy bits are transmitted. The system calculates the actual code rate based on the secret key and transmits only the necessary portion of the coded data. This partial transmission of redundancy maintains sufficient error correction capability while improving payload efficiency by avoiding transmission of excessive redundant information.
Solution Approach 2:
The system dynamically adjusts the coding parameters and puncturing patterns based on the secret key and channel conditions. The code rate and amount of redundancy transmitted are not fixed but adapt according to the parameterization by the secret key, allowing optimization of the balance between reliability and payload efficiency for different transmission scenarios.
Data Source
AI summary
Provided is an encoder, a decoder, and a method for encoding first data, in which the channel coding of the first data is parameterized by a secret key.