Multimedia digital rights management based on selective encryption for flexible business model

作者：Kwon Goo Rak; Lama Ramesh Kumar; Pyun Jae Young; Park Chun Su^*

来源：Multimedia Tools and Applications, 2016, 75(12): 6697-6715.

DOI：10.1007/s11042-015-2563-z

• Digital rights management
• Selective encryption
• Partial encryption
• MPEG-4
• MPEG-1 layer III

This paper proposes an advanced encryption of MP3 and MPEG-4 coder with a quality degradation-based security model. For the MP3 audio, the magnitude and phase information of modified discrete cosine transform (MDCT) coefficients is encrypted. DCT coefficients and motion vectors (MVs) are used for the scrambling of the MPEG-4 video. This encryption scheme has a level of security, secures in perception, keeps format compliance, and obtains better time efficiency by reducing the encrypted volumes of multimedia contents. These properties make it practical to incorporate encryption and decryption process into compression and decompression process, and thus suitable for secure A/V transmission or sharing. Experimental results indicate that the proposed technique provides levels of security for a flexible business model and achieves a simple and coding-efficient architecture with no adverse impact on error resilience.

• 出版日期2016-6