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Open AccessArticle

On a Key-Based Secured Audio Data-Hiding Scheme Robust to Volumetric Attack with Entropy-Based Embedding

Cinvestav Unidad Tamaulipas, Km. 5.5 Carr. a Soto la Marina, 87130 Cd Victoria, Tamps., Mexico
Entropy 2019, 21(10), 996; https://doi.org/10.3390/e21100996
Received: 8 October 2019 / Accepted: 9 October 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Entropy Based Data Hiding)
In the data-hiding field, it is mandatory that proposed schemes are key-secured as required by the Kerckhoff’s principle. Moreover, perceptual transparency must be guaranteed. On the other hand, volumetric attack is of special interest in audio data-hiding systems. This study proposes a data-hiding scheme for audio signals, which is both key-based secured and highly perceptually transparent and, thus, robust to the volumetric attack. A modification to a state-of-the-art data-hiding algorithm is proposed to achieve key-based security. Embedding is carried out in the integer discrete cosine transform (DCT) domain; selected samples for embedding are determined by the entropy of the Integer DCT coefficients. Of the two key-based improvements proposed, the multiplicative strategy gives better results, guaranteeing the worst bit error rate when an incorrect key is used. Additionally, the perceptual transparency of the proposed scheme is higher, compared to the state-of-the-art schemes using similar embedding strategies. View Full-Text
Keywords: audio data-hiding; entropy; integer DCT; key-secured audio data-hiding; entropy; integer DCT; key-secured
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Garcia-Hernandez, J.J. On a Key-Based Secured Audio Data-Hiding Scheme Robust to Volumetric Attack with Entropy-Based Embedding. Entropy 2019, 21, 996.

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