RT Journal Article T1 Covert Communications through Network Configuration Messages A1 Ríos-del-Pozo, Rubén A1 Onieva-González, José Antonio A1 López-Muñoz, Francisco Javier K1 Redes de ordenadores - Medidas de seguridad AB Covert channels are a form of hidden communication that may violate the integrity of systems. Since their birth in Multi-Level Security systems in the early 70's they have evolved considerably, such that new solutions have appeared for computer networks mainly due to vague protocols specifications. In this paper we concentrate on short-range covert channels and analyze the opportunities of concealing data in various extensively used protocols today. From this analysis we observe several features that can be effectively exploited for subliminal data transmission in the Dynamic Host Configuration Protocol (DHCP). The result is a proof-of-concept implementation, HIDE_DHCP, which integrates three different covert channels each of which accommodate to different stealthiness and capacity requirements. Finally, we provide a theoretical and experimental analysis of this tool in terms of its reliability, capacity, and detectability. PB Elsevier YR 2013 FD 2013 LK https://hdl.handle.net/10630/38872 UL https://hdl.handle.net/10630/38872 LA eng NO Ruben Rios, Jose A. Onieva, Javier Lopez Covert Communications through Network Configuration Messages In: Computers & Security, vol. 39, Part A, pp. 34 – 46, 2013, ISSN: 0167-4048 NO Política de acceso abierto: https://openpolicyfinder.jisc.ac.uk/id/publication/27894 DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026