Open Access

ARTICLE

Coverless Text Hiding Method Based on Improved Evaluation Index and One-Bit Embedding

Ning Wu^1,2, Yi Yang^1,*, Lian Li¹, Zhongliang Yang³, Poli Shang⁴, Weibo Ma⁵, Zhenru Liu⁵
1 School of Information Science and Engineering, Lanzhou University, Lanzhou, 730000, China
2 School of Computer Science & Artificial Intelligence Lanzhou Institute of Technology, Lanzhou, 730050, China
3 Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
4 School of Electronic and Electrical Engineering, Lanzhou Petrochemical Polytechnic, Lanzhou, 730060, China
5 School of Electrical Engineering, Lanzhou Institute of Technology, Lanzhou, 730050, China
* Corresponding Author: Yi Yang. Email:
(This article belongs to this Special Issue: Information Hiding and Multimedia Security)

Computer Modeling in Engineering & Sciences 2020, 124(3), 1035-1048. https://doi.org/10.32604/cmes.2020.010450

Received 05 March 2020; Accepted 04 June 2020; Issue published 21 August 2020

Abstract

In the field of information hiding, text is less redundant, which leads to less space to hide information and challenging work for researchers. Based on the Markov chain model, this paper proposes an improved evaluation index and onebit embedding coverless text steganography method. In the steganography process, this method did not simply take the transition probability as the optimization basis of the steganography model, but combined it with the sentence length in the corresponding nodes in the model to gauge sentence quality. Based on this, only two optimal conjunctions of the current words are retained in the method to generate sentences of higher quality. Because the size of the training text dataset is generally large, this leads to higher complexity of the steganographic model; hence, fewer repetitions of the generated steganographic sentences occur. Different datasets and methods were selected to test the quality of the model. The results indicate that our method can achieve higher hiding capacity and has better concealment capability.

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Keywords

Coverless text steganography; Markov chain; evaluation index; onebit embedding

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