信息隐藏就是将某一机密信息秘密隐藏到别的公开信息中，通过公开信息的传输来传递机密信息，以此达到提高机密信息的隐蔽性、安全性的目的。它的过程可以简单概括为信息嵌入和信息提取两步。信息隐藏最重要的特性是它的信息隐藏量、透明性及鲁棒性。本文以256级灰度图像为载体，在第k(k=0、1、2、…、7)个位面和第0～k多个位面，用LSB方法分别隐藏信息，并给出了在256级灰度图像中的单个和多个位面隐藏 ASCⅡ码的算法。
Information hiding means embedding the Signature signal into the Host signal so that other cannot find it. Relationship among the quantity of hiding data, their invisibility, and robustness of hiding in an image is studied. A character was embedded into a 256 gray-level image with LSB method. The algorithm to hide the data both in single bit-plane and multi-bit-plane of the image are given. Experiments are carried out to hide characters into each bit-plane(8 bit-planes totally) of the image, and hide characters into multi-bit-plane(0,0～1,0～2,…，0～7) of the same image.
回复Comments