Based on the ideas of public key cryptography, a new scrambling technology of digital image based on primitive roots is given.
以密码学中的公钥思想为基础，提出了一种基于原根的数字图像置乱技术。
The concepts and theory about digital watermark are introduced in this paper. A kind of fragile watermark technology is given by means of digital image scrambling technology.
本文概括地介绍了数字水印技术的概念及原理，并利用数字图像置乱技术，给出了一种脆弱数字水印技术。
Presents a new technology for scrambling and restoring digital image Based on the hierarchical transformation under the control of secret key.
提出了一种新的密钥控制下的分层变换的数字图像置乱算法。
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