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Chaos-based bit-level audio encryption method

An encryption method and chaotic technology, which is applied in the direction of secure communication, digital transmission system, and secure communication device through chaotic signals, to achieve the effects of protection security, good encryption effect, and good security

Active Publication Date: 2021-10-15
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, there are significant risks in the network

Method used

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  • Chaos-based bit-level audio encryption method
  • Chaos-based bit-level audio encryption method
  • Chaos-based bit-level audio encryption method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The implementation process of the present invention will be further described in detail below in conjunction with specific drawings and examples.

[0036] figure 1 is the encryption flowchart of this method.

[0037] The programming software used is Matlab R2016b, and an audio file with a size of 73113×1 is selected as the original audio. Using this method, the detailed process of encrypting the original image is described as follows.

[0038] Step 1: Let the interactive audio file be A 1 , whose size is m ×1, m is the number of phonemes, 1 means the audio file is mono; A 1 The range of elements in the middle is [-1, 1], add 1 to all elements to make the range become [0, 2], and then multiply the specified coefficient d , making each phoneme value available n represented by a binary bit;

[0039] Step 2: Chaotic sequence generation: select the initial value of PWLCM x 0 1 =0.203 and parameter p 1 =0.190, iterate the map 16 times to obtain a chaotic seque...

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Abstract

A bit-level encryption algorithm based on chaos belongs to the field of information encryption. At present, the activities of transmitting audio files and communicating with voice on the network are becoming more and more frequent. In order to protect the security of multiple audio contents, the present invention proposes a bit-level encryption algorithm based on chaos. First, the phoneme is integerized, then the key is used to generate a chaotic sequence, and then the integer is performed, and then the phoneme-level scrambling and bit-level diffusion are performed, and finally the phoneme is decimalized to obtain the encrypted audio. Experiments show that the algorithm can encrypt multiple audio files at the same time, and the algorithm has good encryption effect, strong key sensitivity, high security and high efficiency.

Description

technical field [0001] This article involves an audio encryption method, mainly for encrypting a single audio file. Background technique [0002] In recent years, with the development of big data technology and the popularization of 5G, people rely more and more on tools such as mobile phones and the Internet for communication and communication. At the same time, there are great risks in the network. Problems such as information leakage and malicious tampering are emerging one after another, so information encryption technology is becoming more and more popular. Among them, audio encryption uses the matrix characteristics of digital audio to scramble or diffuse according to specific transformation rules, so as to make the information of the original audio "chaotic". [0003] Audio encryption mainly includes two methods of phoneme scrambling and phoneme diffusion. The purpose of phoneme scrambling is the position of the phoneme; the purpose of phoneme diffusion is to chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L29/08
CPCH04L9/001H04L67/06H04L2209/60
Inventor 张晓强李泳锋
Owner CHINA UNIV OF MINING & TECH