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一个挑战在LSB隐藏加密消息和LSB + 1位位置在不同覆盖文件

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现在的工作基本上以加密的形式向我们展示了一个如何隐藏信息任何封面文件,如. exe文件,微软office文件,.dbf文件、图像文件、音频文件和视频文件。然而,隐藏消息的大小必须相比非常小的文件是一个可执行文件。到目前为止没有人试图隐藏信息在任何可执行文件。使这个系统全面担保,我们首先使用MSA算法加密的秘密消息(Nath et al .(1)),然后我们隐藏加密的消息在覆盖文件。介绍了一种新方法隐瞒任何秘密消息在一个覆盖文件加密。加密机密消息我们使用纳等人提出的新算法(1)。为我们改变了LSB和LSB隐藏秘密信息+ 1位覆盖每个字节的文件。纳提出的广义方法等等(2),在那里他们嵌入秘密消息不为任何加密。MSA(1)算法引入了一个新的随机方法生成随机密钥矩阵对纯文本文件进行加密和解密密文文件。MSA(1)方法也包含了多个加密和解密过程。 To initiate the MSA algorithm the user has to enter a text_key, which can be of 16 characters long. This text_key is used to calculate the randomization number and the encryption number from the given text_key. The size of the encryption key matrix is 16x16 and the total number of matrices can be formed from 16 x 16 is 256! which is quite large and the MSA algorithm ensures that any of the pattern may be used for encryption as well as decryption process. To hide encrypted secret message in the cover file we have inserted the 8 bits of each character of encrypted message file in 4 consecutive bytes of the cover file such that only LSB and LSB+1 bits are changed depending on the bit pattern of the encrypted secret message. To make system further secured one has to enter a password before the actual steganography process starts. We propose that our new method could be most appropriate for hiding any file in any non-standard cover file such as executable file, compiler, MS-Office files, Data Base files such as .DBF, text editor such as notepad plus the standard cover files such as image, audio, video files etc. The size of the secret message be very small in comparison to the executable cover file. The present method may be implemented in mobile network, Bank data transactions in government sectors, in police department.

Joyshree Nath Sankar Das, Shalabh Agarwal Asoke纳

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