Highly Transparent and Secure Scheme for Concealing Text Within Audio
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- 关键词：Steganography ; Quantization Index Modulation ; Orthogonal Variable Spreading Factor ; Discrete Wavelet Transform ; Security
- 刊名：Lecture Notes in Computer Science
- 出版年：2017
- 出版时间：2017
- 年：2017
- 卷：10125
- 期：1
- 页码：27-35
- 丛书名：Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications
- ISBN：978-3-319-52277-7
- 卷排序：10125
文摘
This paper presents a highly transparent and secure scheme for concealing text within audio, based on Quantization Index Modulation and Orthogonal Variable Spreading Factor. The audio signal is decomposed through the Discrete Wavelet Transform and the approximation coefficients are selected to embed the text. Every character of the text is represented by a 256-bit orthogonal code, through mapping operations between the ASCII integer representation of the character and an external key. For improving the quality of recovered data, a repetition code is applied in the embedding process. Several tests were performed in order to measure the transparency of the output audio signal (i.e. stego signal) and the security of the recovered one. The main advantage of our proposal is the good trade-off among transparency, security and hiding capacity.