tailieunhanh - Báo cáo hóa học: " Research Article Efficient and Syntax-Compliant JPEG 2000 Encryption Preserving Original Fine Granularity of Scalability"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Efficient and Syntax-Compliant JPEG 2000 Encryption Preserving Original Fine Granularity of Scalability | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2007 Article ID 56365 13 pages doi 2007 56365 Research Article Efficient and Syntax-Compliant JPEG 2000 Encryption Preserving Original Fine Granularity of Scalability Yang Yang 1 Bin B. Zhu 2 Shipeng Li 2 and Nenghai Yu1 1 Department of Electrical Engineering and Information Science University of Science and Technology of China Hefei Anhui 230027 China 2 Microsoft Research Asia Beijing 100080 China Correspondence should be addressed to Bin B. Zhu binzhu@ Received 29 June 2007 Revised 29 October 2007 Accepted 23 November 2007 Recommended by E. Magli A novel syntax-compliant encryption primitive and an efficient syntax-compliant JPEG 2000 encryption scheme are presented in this paper. The syntax-compliant encryption primitive takes as input syntax-compliant plaintext and produces syntax-compliant ciphertext. It is faster than all the other syntax-compliant encryption primitives we know. Our JPEG 2000 encryption scheme encrypts independently either each codeblock segment normal mode or each intersection of a codeblock segment and a codeblock contribution to a packet in situ mode . Truncation-invariant parameters uniquely identifying each independently encrypted data block are combined with a global initialization vector to generate on the fly an initialization vector IV used to encrypt the data block. These IVs can be correctly regenerated even when the encrypted codestream is truncated. Encrypted codestreams are syntax-compliant. The original granularity of scalability is fully preserved after encryption so that an encrypted codestream can be truncated to adapt to different representations without decryption. Our JPEG 2000 encryption scheme is fast error-resilient and has negligible file-size overhead. Copyright 2007 Yang Yang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and