An Efficient Encryption and Key Management Scheme for Layered Access Control of H.264/Scalable Video Coding

Su-Wan PARK  Sang Uk SHIN  

IEICE TRANSACTIONS on Information and Systems   Vol.E92-D   No.5   pp.851-858
Publication Date: 2009/05/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E92.D.851
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security)
Category: Contents Protection
H.264/SVC,  scalable video coding (SVC),  encryption,  key management,  access right,  

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This paper proposes a new selective encryption scheme and a key management scheme for layered access control of H.264/SVC. This scheme encrypts three domains in hierarchical layers using different keys: intra prediction modes, motion vector difference values and sign bits of texture data. The proposed scheme offers low computational complexity, low bit-overhead, and format compliance by utilizing the H.264/SVC structure. It provides a high encryption efficiency by encrypting domains selectively, according to each layer type in the enhancement-layer. It also provides confidentiality and implicit authentication using keys derived in the proposed key management scheme for encryption. Simulation results show the effectiveness of the proposed scheme.