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A new encryption algorithm for image cryptosystems
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DOI：10.1016/S0164-1212(01)00029-2.png)
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There are two major differences of the characteristics of the text data and image data. One difference is that the size of image data is usually much larger than that of text data. The other is that plain data rarely permit loss when a compression technique is used, but image data do. In this paper, we design an efficient cryptosystem for images. Our method is based on vector quantization, which is one of the popular image compression techniques. Our method can achieve the following two goals. One goal is to design a high security image cryptosystem. The other goal is to reduce computational complexity of the encryption and decryption algorithms. (C) 2001 Elsevier Science Inc. All rights reserved.
Keyword:
cryptography
image compression
image cryptosystem
image process
vector quantization
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