Digital Rights Management of A/V Codec for Mobile Devices
Goo‐Rak Kwon · ICEIC : International Conference on Electronics, Informations and Communications · 2008
Traditional cryptographic algorithms / systems for data security are often not fast enough to process the vast amount of data generated by the multimedia applications to meet the real-time constraints. In this paper, we propose a new encryption method for digital rights managements of multimedia contents for mobile multimedia devices. For the audio copyright, the magnitude and phase information of modified discrete cosine transform coefficients is encrypted. Transformed coefficients and motion vectors are used for the encryption of video copyright. Experimental results show that the proposed method can achieve very low cost of the encryption. Moreover, the processing overhead is usually negligible, compared to compression / decompression.