A Technique of High Embedding Rate Text Steganography Based on Whole Poetry of Song Dynasty

Abstract

Text steganography is a kind of technique which can transmit secret information using text as carrier. Compared with other types of carriers such as image and video, the embedding rate and capacity of text steganography algorithm is generally lower due to its low redundancy. A text steganography algorithm using single Ci-Pai of song poetry as a template and the embedding rate of it reaches 16.1 %. This paper presents a new text steganography algorithm based on song poetry with a higher embedding rate 27.1 %. In our proposed scheme, by selecting and processing 2538 pieces of song poetry which from 145 pieces of different Ci-Pai, a system which includes the template, the large capacity of lexicon, the encoder and the decoder is constructed. According to users’ needs, the proposed scheme can generate arbitrary Ci-Pai to make the secret messages hidden in the song poetry which metrical patterns, rhyme words completely accord with the Ci-Pai. Additionally, we confirm our high embedding rate through theoretical analysis and extensive experiments.