Author : Shraddha Arun Dangare 1
Date of Publication :7th April 2016
Abstract: As we know, in the field of Computer Science, Cloud computing is a very important as well as rapidly developing technology trend. To maintain security and privacy in the encryption domain the digital videos need to be stored and processed. To avoid content notation and interfering detection, it is compulsory to perform data hiding in these encrypted videos. Thus the confidentiality of the content/text is preserved using Data Hiding in encrypted domain without decryption. It is more efficient to perform it without decryption which is followed by data hiding and re-encryption. Here, a scheme of data hiding in an encrypted version of H.264/AVC video stream is proposed, which includes important 3 parts, viz., data embedding and abstraction and H.264/AVC video encryption. With the help of the property of H.264/AVC codec, the encryption with stream ciphers is done using the following code words: the code words of intra prediction modes, the code words of motion vector differences, and the code words of residual coefficients. In this technique without knowing the video content a data hider can encode additional data in the encrypted domain by using code word substitution technique. There are two aspects for data extraction in which data can be extracted either in the encrypted domain or in the decrypted domain. Even after encryption and data embedding, video file size is strictly preserved. Experimental results have demonstrated the feasible as well as efficient proposed scheme.
Reference :
-
- J. G. Jiang, Y. Liu, Z. P. Su, G. Zhang, and S. Xing, “An improved selective encryption for H.264 video based on intra prediction mode scrambling,” J. Multimedia, vol. 5, no. 5, pp. 464–472, 2010.
- D. K. Zou and J. A. Bloom, “H.264 stream replacement watermarking with CABAC encoding,” in Proc. IEEE ICME, Singapore, Jul. 2010, pp. 117–121
- D. W. Xu and R. D. Wang, “Watermarking in H.264/AVC compressed domain using Exp-Golomb code words mapping,” Opt. Eng., vol. 50,no. 9, p. 097402, 2011.
- D. W. Xu, R. D. Wang, and J. C. Wang, “Prediction mode modulated data-hiding algorithm for H.264/AVC,” J. RealTime Image Process.,vol. 7, no. 4, pp. 205–214, 2012.
- T. Shanableh, “Data hiding in MPEG video files using multivariate regression and flexible macroblock ordering,” IEEE Trans. Inf. Forensics Security, vol. 7, no. 2, pp. 455– 464, Apr. 2012.