tailieunhanh - Báo cáo hóa học: " Research Article Multimedia Encryption with Joint Randomized Entropy Coding and Rotation in Partitioned Bitstream"

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 Multimedia Encryption with Joint Randomized Entropy Coding and Rotation in Partitioned Bitstream | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2007 Article ID 35262 18 pages doi 2007 35262 Research Article Multimedia Encryption with Joint Randomized Entropy Coding and Rotation in Partitioned Bitstream Dahua Xie and . Jay Kuo Ming Hsieh Department of Electrical Engineering and Integrated Media Systems Center University of Southern California Los Angeles CA 90089-2564 USA Correspondence should be addressed to Dahua Xie dahuaxie@ Received 4 March 2007 Revised 21 July 2007 Accepted 11 September 2007 Recommended by E. Magli This work investigates the problem of efficient multimedia data encryption. A novel methodology is proposed to achieve encryption by controlling certain operations in the data compression process using a secret key. The new encryption approach consists of two cascaded modules. The first one is called randomized entropy coding REC while the second one is called rotation in partitioned bitstream RPB . By leveraging the structure of the entropy coder the joint REC RPB encryption scheme incurs extremely low computational and implementation costs. Security analysis shows that the proposed scheme can withstand the ciphertext-only attack as well as the known chosen plaintext attack. The efficiency and security of the proposed encryption scheme makes it an ideal choice in secure media applications where a large amount of multimedia data has to be encrypted decrypted in real time. Copyright 2007 D. Xie and . J. Kuo. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION The wide availability of digital multimedia contents as well as the accelerated growth of wired and wireless communication technologies have brought the multimedia content security issue to the forefront. In particular the problem of efficient multimedia data .