With the rapid development of information netization, image interaction in the Internet is widely applied in many fields. People pay much attention to the security of image interaction. We illustrate the encryption principles, characteristics and new development of the important image encryption algorithms, such as those based on matrix transformation, chaos, image secret sharing, frequency domains, SCAN languages, and DNA computing. Finally, the development trend of image encryption algorithm is discussed in this paper. This study is significant in algorithm improvement, new algorithm design and algorithm selection in the practice of image encryption.%随着信息网络化飞速发展,图像网络交互在诸多领域得到应用,图像交互的安全问题倍受人们关注.本文讨论了基于现代密码体制的图像加密、基于矩阵变换的图像加密、基于混沌的图像加密、基于秘密分存的图像加密、基于频域的图像加密、基于SCAN语言的图像加密和基于DNA计算的图像加密等主流图像加密算法的加密原理、优缺点和最新进展.最后,展望了图像加密算法的发展趋势.该成果对图像加密算法的改进、新算法的研究以及在实际工程中对算法的选取具有重要意义.
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