Enhanced Virtual Private Social Networks: Implementing user content confidentiality. - Charles A. Clarke; Eckhard Pfluegel; Dimitris Tsaptsinos (ICITST, 2013)

Hide-as-you-Type: An Approach to Natural Language Steganography through Sentence Modification. - Charles A. Clarke; Eckhard Pfluegel; Dimitris Tsaptsinos (HPCC/CSS/ICESS, 2014)

Multi-channel overlay protocols: Implementing ad-hoc message authentication in social media platforms. - Charles A. Clarke; Eckhard Pfluegel; Dimitris Tsaptsinos (CyberSA, 2015)

Dual carrier steganographic messaging protocols for mobile messaging applications. - Charles A. Clarke (2016)

A multi-channel steganographic protocol for secure SMS mobile banking. - Omego Obinna; Eckhard Pfluegel; Charles A. Clarke; Martin J. Tunnicliffe (ICITST, 2017)

Ensuring Message Freshness in A Multi-Channel SMS Steganographic Banking Protocol. - Omego Obinna; Eckhard Pfluegel; Martin J. Tunnicliffe; Charles A. Clarke (Cyber Security, 2018)