信息隐藏是信息安全的重要分支,常利用流媒体冗余对信息做隐藏,实现信息的隐蔽传输.以数字水印技术为依托,将隐藏信息做置乱处理,发现单置乱效果差、多次置乱后能恢复出信息.因此,借鉴Arnold置乱思想对隐藏信息做灰度、位置双重置乱,其单次置乱效果要比多次单置乱效果好,且置乱参数可根据用户自行设定作为隐藏密钥,实现了更安全的信息隐藏传输.在嵌入算法方面,采用较传统LSB和小波分解对比检验置乱效果,发现所提双置乱算法性能较单置乱更优,算法复杂度和恢复也极为简单,能很好地应用于很多场景.%Information hiding is an important branch of information security, usually by using streaming media redundancy to hide information and achieve the information-hidden transmission. The hidden information is scrambled by using digital watermarking technology, and experiment indicates that a single operation would result in poor performance and the information could be fairly recovered after several scrambling. By referring to the idea of Arnold scrambling, scrambling is implemented on both gray scale and position, the resulted performances is better than that by a single scrambling, and the scrambling parameters can be set by the user as the information-hidden key thus realizing a more secure hidden- information transmission. As for the embedded algorithm, the LSB and wavelet decomposition are compared for their scrambling effects, and this comparison indicates that the proposed dual-scrambling algorithm performs better than the single scrambling algorithm, with low computation complexity and simple recovery, and thus could be applied to many actual scenes.
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