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http://dx.doi.org/10.6109/jkiice.2013.17.3.603

Efficient Encryption Technique of Image using Packetized Discrete Wavelet Transform  

Seo, Youngho (광운대학교 교양학부)
Choi, Eui-Sun (한국폴리텍 4대학)
Kim, Dong-Wook (광운대학교 전자재료공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.17, no.3, 2013 , pp. 603-611 More about this Journal
Abstract
In this paper, we propose a new method which estimates and encrypts significant component of digital image such as digital cinema using discrete wavelet packet transform (DWPT). After analyzing the characteristics of images in spatial and frequency domain, the required information for ciphering an image was extracted. Based on this information an ciphering method was proposed with wavelet transform and packetization of subbands. The proposed algorithm can encrypt images in various robust from selecting transform-level and energy threshold. From analyzing the encryption effect numerically and visually, the optimized parameter for encryption is presented. Without additional analyzing process, one can encrypt efficiently digital image using the proposed parameter. Although only 0.18% among total data is encrypted, the reconstructed image dose not identified. The paketization information of subbands and the cipher key can be used for the entire secret key.
Keywords
encryption; image; discrete wavelet transform; subband; energy;
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Times Cited By KSCI : 1  (Citation Analysis)
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