Using pdf files as steganographic containers
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Abstract
Nowadays, steganography uses almost all the variety of steganographic containers, from ordinary graphic files to video and audio content. The task of steganography is to hide the very fact of transmitting a notification or some information. On the other hand, you need to be sure that the information you have transmitted has not been distorted or replaced. Often, to protect the document from distortion on the way to the end user, the pdf file format is used ‒ portable document format. However, this file format, due to its rather simple and convenient structure, is quite easy to use as a steganographic container and add significant amounts of information without the knowledge of the sender of the file. But we can use these properties not only to transmit hidden information, but also to protect the information itself by transmitting the hash of the file itself along with the file itself.
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References
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