【摘要】 给出了一种无损的隐秘传输方法,将机密信息隐藏在宿主多媒体信息中不易被感知的部位中,通过公共信道进行传输,在接收端提取出所嵌入的机密信息后,宿主数据可无损恢复。给出了一个改进的整数变换,提出了新的宿主类型判别条件,与Alattar方法相比,具有较低的时间复杂度。该方法已通过计算机模拟,获得预期结果,可成功地将机密汉字信息隐藏在语音信息中,通过局域网进行隐秘传输,提取出所嵌入汉字信息后,原宿主数据可无损恢复。更多还原

【Abstract】 A lossless covert communication method was proposed.Secret information was hidden in some imperceptible parts of host multimedia information and transmitted in open channels.Host data could be lossless restored when secret information was extracted from receiving host data which hidden secret information.The improved integer transform and new type judgement conditions were given.The algorithm has lower time complexity compared with Alattar’s algorithm.The method was simulated by computers which got expectant results.Finally,the algorithm was applied to covert communication of speech signal hidden secret Chinese characters.Speech signal was transmitted in local area networks and host data could be lossless restored after embedded Chinese characters were extracted.更多还原