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Hash key-based video encryption scheme for H.264/AVC / Xiaofeng Wang in Signal processing. Image communication, Vol. 25 N° 6 (Juillet 2010) 

Public ISBD [article]  in Signal processing. Image communication > Vol. 25 N° 6 (Juillet 2010) . - pp. 427–437 Titre : Hash key-based video encryption scheme for H.264/AVC Type de document : texte imprimé Auteurs : Xiaofeng Wang, Auteur ; Nanning Zheng, Auteur ; Lihua Tian, Auteur Année de publication : 2012 Article en page(s) : pp. 427–437 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Video  encryption  H.264/AVC  Intra-prediction  mode  Motion  vector  difference  Quantization  coefficient  Hash  function Résumé : An improved H.264/AVC comprehensive video encryption scheme is proposed. In the proposed scheme, the intra-prediction mode, motion vector difference, and quantization coefficients are encrypted. A novel hierarchical key generation method is likewise proposed, in which the encryption keys are generated based on the cryptographic hash function. Generated frame keys are consistent with the corresponding frame serial numbers, which can ensure frame synchronization in the decrypting process when frame loss occurs. This function provides the property that our scheme is secure against some special attacks for video, such as the frame regrouping attack and frame erasure attack. Our method not only avoids the distribution of encryption keys, but also increases the security. Experimental results show that the proposed scheme is efficient in computing, the encryption process does not affect the compression ratio greatly, and the encryption/decryption process hardly affects the video quality. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510000366 [article] Hash key-based video encryption scheme for H.264/AVC [texte imprimé] / Xiaofeng Wang, Auteur ; Nanning Zheng, Auteur ; Lihua Tian, Auteur . - 2012 . - pp. 427–437. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 25 N° 6 (Juillet 2010) . - pp. 427–437 Mots-clés : Video  encryption  H.264/AVC  Intra-prediction  mode  Motion  vector  difference  Quantization  coefficient  Hash  function Résumé : An improved H.264/AVC comprehensive video encryption scheme is proposed. In the proposed scheme, the intra-prediction mode, motion vector difference, and quantization coefficients are encrypted. A novel hierarchical key generation method is likewise proposed, in which the encryption keys are generated based on the cryptographic hash function. Generated frame keys are consistent with the corresponding frame serial numbers, which can ensure frame synchronization in the decrypting process when frame loss occurs. This function provides the property that our scheme is secure against some special attacks for video, such as the frame regrouping attack and frame erasure attack. Our method not only avoids the distribution of encryption keys, but also increases the security. Experimental results show that the proposed scheme is efficient in computing, the encryption process does not affect the compression ratio greatly, and the encryption/decryption process hardly affects the video quality. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510000366