With the recent spate of data loss breaches from industry and commerce, especially with the large
number of Advanced Persistent Threats, companies are increasing their network boundary security.
As network defences are enhanced through the use of Data Loss Prevention systems (DLP), attackers
seek new ways of exploiting and extracting confidential data. This is often done by internal parties in
large-scale organisations through the use of steganography. The successful utilisation of
steganography makes the exportation of confidential data hard to detect, equipped with the ability of
escaping even the most sophisticated DLP systems. This thesis provides two effective solutions to
prevent data loss from effective LSB image steganographic behaviour, with the potential to be applied
in industrial DLP systems
