An Email based high capacity text steganography scheme using combinatorial compression

In this paper, we propose an email based high capacity text steganography method using combinatorial compression. The method makes use of forward email platform to hide the secret data in email addresses. We use the combination of BWT + MTF + LZW coding algorithm to increase the hiding capacity, as it is proved that this combination increases the compression ratio. To further increase the capacity, the numbers of characters of email id are also used to refer the secret data bits. Furthermore, the method adds some random characters just before the `@' symbol of email ids to increase the randomness. Experimental results show that our method performs better than the some important existing methods in terms of hiding capacity.