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Joint channel security coding method based on balance index and polarization code

A secure encoding and joint channel technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve the problems of high encoding and decoding complexity, large keys, etc., achieve low encoding and decoding complexity, resist exhaustive attacks, Effect of small key length

Inactive Publication Date: 2017-01-18
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rise of Turbo codes and low density parity check (LDPC) codes, it is possible for the code rate to approach the channel capacity of additive white Gaussian noise. Private key encryption system, but still has the characteristics of high encoding and decoding complexity and large keys

Method used

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  • Joint channel security coding method based on balance index and polarization code
  • Joint channel security coding method based on balance index and polarization code
  • Joint channel security coding method based on balance index and polarization code

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and example further illustrate the present invention.

[0019] Symbol representation and parameter description:

[0020] Polar code encoder C 1 (N 1 , k 1 ):k 1 is the length of the input information packet, N 1 is the code length, and N 1 is an exponent of 2, so that its balanced index requires log 2 N 1 Bit said.

[0021] Polar code encoder C 2 (N 2 , k 2 ):k 2 is the length of the input information packet, and k 2 for log 2 N 1 Integer multiples of k 2 =qlog 2 N 1 , such that the encoder C 2 Can pair q group C 1 The balance index of the codeword to encode, N 2 is the code length, and N 2 is an exponent of 2.

[0022] 1. Joint channel-safe coding scheme based on balanced index and polar code

[0023] Proceed as follows:

[0024] 1) Serial-to-parallel converter module 1 converts k 1 The message sequence u of q bits is converted into q k 1 bit message sequence u i , 1≤i≤q, where q=k 2 / log 2 N ...

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Abstract

The invention discloses a joint channel security coding method based on a balance index and a polarization code. The method comprises the steps that after polarization code coding is carried out on all message sequences, the sequences are encoded into balance code words with the same number of 0 and 1; the balance index is used to carry out one-time pad sequence password encryption with small complexity on the balance code words; and private key encryption system encryption is carried out on the balance index based on the polarization code. The code words have dual functions of error correction and encryption, which can reduce the overhead of a system. In the design of the private key encryption system, the redundant information freeze bit of the polarized code is used as one private key which has the tasks of error correction and encryption; a randomly generated error vector ensures that the system is resistant to the existing exhaustive attack and selection plaintext attack; and the decoding complexity is reduced.

Description

technical field [0001] The invention relates to a joint channel security coding method based on a balanced index and a polar code, and mainly relates to a joint channel security coding method that can reduce overall coding overhead and has dual functions of error correction and encryption. Background technique [0002] With the improvement of error control coding theory and the rapid development of large-scale and ultra-large-scale integrated circuits, error-correcting codes have been widely used in various communication systems, such as video transmission, mobile communication, and deep space communication. On the other hand, with the advancement of information technology in modern society, especially in the widespread application of wireless networks today, more and more attention has been paid to information security issues. While the openness of wireless channels brings convenience to people's lives, it also Increased risk of attackers eavesdropping on wireless transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L29/06
CPCH04L1/0056H04L63/0435
Inventor 陈德元韩旭高绍帅张灿
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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