Abstract
Focusing on the encryption of digital image and video, this paper reports an intrinsic weakness of all existing discrete-cosine-transform (DCT) based algorithms. This serious weakness of DCT is analyzed theoretically and then demonstrated practically. As an instance, a novel attack algorithm is proposed to acquire the sketch information from the encrypted data without any pre-knowledge of the encryption algorithm. Thereafter, to solve this problem, a full inter-block shuffle (FIBF) approach is developed and it can be employed to improve the encryption security in all DCT-based algorithms, such as JPEG, MPEG and H.26x.
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Li, W., Yuan, Y. (2006). Visual Information Encryption in Frequency Domain: Risk and Enhancement. In: Zheng, N., Jiang, X., Lan, X. (eds) Advances in Machine Vision, Image Processing, and Pattern Analysis. IWICPAS 2006. Lecture Notes in Computer Science, vol 4153. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11821045_24
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DOI: https://doi.org/10.1007/11821045_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-37597-5
Online ISBN: 978-3-540-37598-2
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