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A Compressed Audio Adaptive Steganography Method and System Based on Equal Length Entropy Codeword Replacement

A self-adaptive, codeword technology, applied in the field of information hiding, can solve the problems of low capacity and poor security, achieve the effect of high embedding rate, high security, and improve anti-steganalysis ability

Active Publication Date: 2021-12-14
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Aiming at the problems of low capacity and poor security of existing compressed audio steganographic methods such as MP3, the present invention proposes a compressed audio adaptive steganographic method and system based on equal-length entropy codeword replacement

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  • A Compressed Audio Adaptive Steganography Method and System Based on Equal Length Entropy Codeword Replacement
  • A Compressed Audio Adaptive Steganography Method and System Based on Equal Length Entropy Codeword Replacement
  • A Compressed Audio Adaptive Steganography Method and System Based on Equal Length Entropy Codeword Replacement

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Embodiment Construction

[0034] The compressed audio adaptive steganography method based on equal-length entropy codeword replacement of the present invention includes information embedding and information extraction, and the specific implementation is described in detail as follows.

[0035] figure 1 It is the realization flow chart of the information steganography method of the present invention, figure 2 It is the module composition and working flow chart of the steganography system corresponding to the method. It can be mainly divided into six modules: codeword-binary mapping module, distortion function module, scrambling module, STC encoding module, inverse scrambling module and binary-codeword mapping module. First, the original Huffman code stream H c After the codeword-binary mapping module, it will be converted into a carrier bit string C. Second, the distortion function module calculates the modification cost ρ of each embeddable position according to the psychoacoustic model and the coe...

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Abstract

The invention discloses a compressed audio self-adaptive steganography method and system based on equal-length entropy code word replacement. The information embedding part of this method is: establish a Huffman codeword mapping table, generate mutually replaceable Huffman codeword pairs, and map the available Huffman codewords in the large-value area in the audio frame into a bit string according to the mapping table , and calculate the modification cost of each bit; use the STC code to embed the secret information into the bit string mapped by the Huffman code word, and obtain the encrypted binary string; according to the Huffman code word mapping table, reverse the encrypted bit string It is mapped to the original Huffman codeword, and the secret-bearing Huffman codeword sequence is obtained. The information extraction part maps the steganographic code words in the large-value area of ​​the audio frame into a binary bit string according to the Huffman code word mapping table, and uses STC decoding to extract secret information from the binary bit string. Compared with the existing methods, the steganographic method of the present invention has higher security, larger steganographic capacity and higher embedding rate.

Description

technical field [0001] The invention relates to an information hiding technology, in particular to a method and system for self-adaptive embedding and extraction of information using compressed audio such as MP3 as a carrier. Background technique [0002] With the rapid development of Internet information technology, the problem of information security has become increasingly serious, which has become a hot spot in the current society and has attracted the attention of academic circles. Steganography is an important method to ensure the safe transmission of information and realize covert communication, and it is an important branch of the field of information security. Steganography is mainly to realize the safe transmission of secret information by hiding communication behaviors. It embeds secret information into digital media files, such as audio and video, images and documents, and does not cause visual and auditory perception distortion of the original carrier, making S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/018
CPCG10L19/018
Inventor 易小伟杨坤赵险峰于海波刘长军
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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