SPM: estimating payload locations of QIM-based steganography in low-bit-rate compressed speeches

SPM: estimating payload locations of QIM-based steganography in low-bit-rate compressed speeches

연구 분야: Strategies

학회: Multimedia Tools and Applications

Steganography, adopted to hide secret information into multiple digital carriers, has been widely used by lawbreakers for spiteful purposes, posing a threat to cyber security. Recently, VoIP speech (compressed speech) has been determined as a suitable carrier for steganography. Among the existing VoIP steganography algorithms, QIM-based VoIP steganography has great stealthiness, making it hard to detect. Although some existing studies have been conducted on detecting QIM-based VoIP steganography, some major challenges still exist that need to be addressed. First, no previous study attempts to estimate the payload locations of QIM-based VoIP steganography, a potential research direction, and a practical way of reducing the search space to recover hidden information. Second, the detection performance of existing models on QIM-based VoIP steganography still has a huge room for improvement. To address the above issues, this paper proposes a novel method called the Steganography Payload-localization Model (SPM) as a countermeasure for QIM-based VoIP steganography. Experimental results show that SPM can estimate the payload locations and perform real-time steganalysis regarding QIM-based VoIP steganography with superb performance.