A Novel Approach for Semantic Pure Steganography

by João Teixeira Figueira

MSc thesis presentation and discussion.

Date: 2021-Jan-27   Time: 10:30
Room: Zoom

Abstract: Steganography is the practice of concealing a message within some
other carrier or cover message. It is used to allow the sending of hidden
information through communication channels where third parties would only be
aware of the explicit information in the carrier message. In this thesis we
propose a novel approach for text steganography that can be classified as pure
steganography. The proposed algorithm uses the redundancy in language
semantics as the space for the hidden message. It improves on existing
algorithms by not requiring the message receiver to be aware of the specific
redundancies of any cover message. We contextualize our system by thoroughly
reviewing semantic steganography and the concepts surrounding it, and by
surveying published systems in this area.  Our results show that a semantic
pure steganographic system is possible and can realistically be used, despite
being limited by very low embedding rates.