嵌入低頻率且八度等價的純音達成雙聲道資料隱寫

Abstract

聲音資料隱寫術是將訊息隱藏在聲音之中，使得訊息的傳送者和接收者以外的其他人都無法察覺隱藏訊息的存在。這篇論文利用人類聽覺系統的一些特性，提出了一個雙聲道聲音資料隱寫術的新方法。訊息經由嵌入低頻率且八度等價的純音被隱藏在雙聲道聲音宿主中，然後經由比較左聲道和右聲道的頻域的資料來偵測隱藏的訊息。實驗結果顯示使用我們的方法產生的有隱藏訊息的聲音，和原本的聲音相比，其品質幾乎完全沒有下降，因此惡意的攻擊者將不會注意到隱藏的訊息。

Audio steganography is a technique that hiding messages into audio such that no one except the sender and intended recipient suspects the existence of the messages. In this paper we proposed a new method for stereo audio steganography, which employs some characteristics of human auditory system (HAS). Messages are embedded by inserting low-frequency and octave-equivalent pure tones into different channels. By comparing the frequency domain data of left channel and right channel, the hidden messages are detected. The experiment results demonstrate that comparing with the host audio, the quality of the message-hided audio generated by our method are nearly not decreased, thus malicious attackers will not perceive the hidden messages.