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http://dx.doi.org/10.13089/JKIISC.2011.21.3.183

Encryption of MPEG using Error Propagation by a Receiver  

Jeong, Seo-Hyun (Korea University)
Lee, Sung-Ju (Korea University)
Chung, Young-Wha (Korea University)
Kim, Sang-Chun (Kangwon National University)
Min, Byoung-Ki (ASTEL)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.21, no.3, 2011 , pp. 183-188 More about this Journal
Abstract
According to increased multimedia data(i.e., MPEG video stream) in mobile application, protecting data becomes an important problem in the multimedia data delivery. SECMPEG is a selective encryption approach for protecting multimedia data. However, the computational overhead of SECMPEG's security level 3 is quite large because it encrypts the whole I-frames whose size is relatively larger than P/B-frames. Therefore, we need to analyze the characteristics of MPEG2 standard and derive an effective encryption of the I-frames. In this paper, we propose a slice-level, selective encryption approach by using the error-propagation characteristics of I-frames by a receiver. Our experimental results show that the proposed approach can reduce the execution time of SECMPEG's security level 3 by a factor of 30 without degradation of the security.
Keywords
selective encryption; error propagation; MPEG2;
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