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The recently proposed scalable multi-layer FGS (fine granularity scalability) encryption (SMLFE) encrypts an MPEG-4 FGS stream into multiple PSNR and bitrate quality layers for layered access control. Both layer types are supported simultaneously. A simple key scheme was used in SMLFE. We propose a novel key scheme for SMLFE that reduces the number of keys maintained and managed by a license server...
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