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基于BCH码的信息隐藏方法

An Information Hiding Method Based on BCH Coding
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摘要 基于信道编码的容错冗余特性,文章提出了一种利用BCH码实现信息隐藏的方法。在不改变载体的信源编码结构的前提下,利用伪随机序列调整嵌入步长,将秘密信息当做噪声随机地嵌入到载体的信道编码码流中,避免了传统信息隐藏方法中秘密信息嵌入位置集中的问题。理论分析和实验结果表明,当载体一定时,信道误码率越高,隐藏容量越小;载体信道编码的信息码长越短,隐藏容量越大;载体信道编码的纠错能力越强,隐藏容量越大。实验结果还表明,隐藏信息对载体的恢复并无显著影响。 Due to the fault-tolerant redundancy introduced by the channel coding, a method for information hiding based on BCH coding is proposed. The messages are embedded to the coded carrier based on a pseudo-random sequence, while no changes are made to the source code of the carrier. By this method, the messages are embedded to the carrier just like random noise, which makes it avoid the problem of non-uniformly embedding in traditional information hiding methods. Analysis and experiments show the higher the bit error rate of the channel is, the lower the hiding capacity is; the shorter the length of the information bits in the channel coding of the carrier is, the higher the hiding capacity is; the stronger the error correcting capability of the channel coding is, the higher the hiding capacity is. Moreover, experiments show the embedded data has little influence on the restored carrier.
作者 颜超 于明
出处 《信息网络安全》 2014年第11期26-29,共4页 Netinfo Security
基金 国家自然科学基金[61071123]
关键词 信息隐藏 BCH 信道编码 信息安全 information hiding BCH channel coding information security
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参考文献12

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