About me

I was born in August 1981 in Athens, Greece, and I grew up in a small town called Nafplio.
I received my Ph.D from the Department of Informatics, Athens University of Economics and Business, in June 2009.
I worked as a research associate at the Computer Laboratory, University of Cambridge, and since October 2013, I have been a Lecturer in Computer Science at the School of Engineering and Informatics, University of Sussex.
I am a member of the Foundations of Software Systems (FoSS) research group.
My University profile is here.

My research is in the following (rather broad) research areas:

  • Data Centre Networking and Storage
  • Opportunistic, Delay-Tolerant Networking
  • Software-Defined Networking and Software Verification
  • Delay-Tolerant Networking
  • Information-Centric Networking

I am always interested in supervising talented students who want to do a PhD at the University of Sussex (Brighton is also an excellent place to live). We sometimes offer scholarships to exceptional students. Feel free to send me unofficial enquiries about PhD topics but you need to officially apply here.


October 2013 - Present

Lecturer in Computer Science, School of Engineering and Informatics, University of Sussex

June 2010 - September 2013

Post-doc researcher, Computer Laboratory, University of Cambridge

June 2009 - June 2010

Post-doc researcher, Computer and Communication Systems Lab, Athens University of Economics and Business

Public research profiles: Sussex Repository, Google Scholar, DBLP

Journal Papers

  • P. Tee, G. Parisis, L. Berthouze and I. Wakeman, "Relating Vertex and Global Graph Entropy in Randomly Generated Graphs", Entropy 2018, 20(7), 481.
  • A. Rajaei, D. Chalmers, I. Wakeman and G. Parisis, "Efficient geocasting in opportunistic networks", Computer Communications, Volume 127, 2018, Pages 105-121, ISSN 0140-3664.
  • P. Tee, I. Wakeman, G. Parisis, J. Dawes, I. Z. Kiss, "Constraints and Entropy in a Model of Network Evolution", The European Physical Journal B (2017) 90: 226.
  • P. Tee, G. Parisis and I. Wakeman, "Vertex Entropy As a Critical Node Measure in Network Monitoring," IEEE Transactions on Network and Service Management, vol. 14, no. 3, pp. 646-660, Sept. 2017.
  • G. Parisis, V. Sourlas, K.V Katsaros, W.K. Chai, G. Pavlou, I. Wakeman, "Efficient Content Delivery through Fountain Coding in Opportunistic Information-Centric Networks", Computer Communications, Volume 100, 1 March 2017, Pages 118-128, ISSN 0140-3664.
  • G. Parisis and D. Trossen, "Filling the gaps of unused capacity through a fountain coded dissemination of information", SIGMOBILE Mob. Comput. Commun. Rev. 18, 1, 46-54, 2014.
  • B. Tagger, D. Trossen, A. Kostopoulos, S. Porter and G. Parisis, "Realising an application environment for information-centric networking, Computer Networks, Volume 57, Issue 16, Pages 3249-3266, ISSN 1389-1286, November 2013.
  • G. Parisis, D. Trossen and H. Asaeda, "A Node Design and a Framework for Development and Experimentation for an Information-Centric Network", IEICE Transactions on Communications, 2013.
  • D. Trossen and G. Parisis, "Designing and Realizing an Information-Centric Internet", IEEE Communications Magazine, Volume 50, Issue 7, pp. 60-67, July 2012.
  • A. Kousaridas, G. Parisis, and T. Apostolopoulos, "An open financial services architecture based on the use of intelligent mobile devices", Electronic Commerce Research Applications, 7, 2, pages 232-246, July 2008.

Conference and Workshop Papers (and Demos/Posters)

  • M. Alasmar, G. Parisis and J. Crowcroft, "Polyraptor: Embracing Path and Data Redundancy in Data Centres for Efficient Data Transport", In Proc. of ACM SIGCOMM 2018 (poster session)(accepted).
  • A. Messager, G. Parisis, R. Harper†, P. Tee, I.Z. Kiss and L. Berthouze, "Network Events in a Large Commercial Network: What can we learn?", In Proc. of IFIP NOMS AnNet Workshop 2018, Taipei, Taiwan.
  • P. Fussey and G. Parisis, "An In-Vehicle Software Defined Network Architecture for Connected and Automated Vehicles", In Proc. of ACM CarSys 2017 (Poster Session), Snowbird, Utah, USA.
  • A. Rajaey, D. Chalmers, I. Wakeman and G. Parisis, "GSAF: Efficient and Flexible Geocasting for Opportunistic Networks", In Proc. of IEEE WoWMoM 2016, Coimbra, Portugal.
  • P. Tee, G. Parisis and I. Wakeman, "Towards an Approximate Graph Entropy Measure for Identifying Incidents in Network Event Data", In Proc. of IFIP NOMS AnNet Workshop 2016, Istanbul, Turkey.
  • M. Kheirkhah, I. Wakeman and G. Parisis, "MMPTCP: a multipath transport protocol for data centers", In Proc. of IEEE INFOCOM 2016, San Francisco, USA.
  • G. Parisis, V, Sourlas, K.V. Katsaros, W.K. Chai, G. Pavlou, "Enhancing Multi-source Content Delivery in Content-Centric Networks with Fountain Coding", In Proc. of CoNEXT CCDWN Workshop, 2015.
  • M.Kheirkhah, I.Wakeman and G.Parisis, "Short vs. Long Flows: A Battle That Both Can Win", In Proc. of SIGCOMM 2015 (Poster Sessions), London, UK.
  • M.Kheirkhah, I.Wakeman and G.Parisis, "Multipath-TCP in ns-3", In Proc. of WNS3-2014, Atlanta GA, USA.
  • G. Parisis, T. Moncaster, A. Madhavapeddy, J. Crowcroft, "Trevi: watering down storage hotspots with cool fountain codes", In Proc. of the Twelfth ACM Workshop on Hot Topics in Networks (HotNets-XII), College Park, MD, USA, 2013.
  • G. Parisis and D. Trossen, "Filling the Gaps of Unused Capacity through a Fountain Coded Dissemination of Information", In Proc. of ACM MobiCom Workshop on Lowest Cost Denominator Networking for Universal Access, Miami, United States, 2013.
  • G. Parisis and D. Trossen, "Digital Fountains in Information-Centric Networking", In Proc. of SIGCOMM ICN 2013 workshop, Hong Kong, China, August, 2013.
  • G. Parisis, D. Trossen and D. Syrivelis, "Implementation and Evaluation of an Information-Centric Network", In Proc. of the IFIP Networking 2013 Conference , New York, USA, May, 2013.
  • G. Parisis, B. Tagger, D. Trossen, C. Tsilopoulos, Y. Thomas, C. Stais and G. Xylomenos, "Demonstrating Usage Diversity Over an Information-Centric Network", In Proc. of INFOCOM 2013 (Demo Sessions) , Turin, Italy, April, 2013.
  • P. Flegkas, V. Sourlas, G. Parisis and D. Trossen, "Storage Replication in Information-Centric Networking", In Proc. of the International Conference on Computing, Networking and Communications, San Diego, USA, January, 2013.
  • D. Syrivelis, G. Parisis, D. Trossen, Paris Flegkas, Vasilis Sourlas, Thanasis Korakis and Leandros Tassiulas, "Pursuing a Software-Defined Information-Centric Network", In Proc. of EWSDN, Darmstadt, Germany, October 2012.
  • G. Parisis, B. Tagger, D. Trossen, D. Syrivelis, P. Flegkas, L. Tassiulas, C. Stais, C. Tsilopoulos and George Xylomenos, "Demonstrating an Information-Centric Network in an International Testbed", In Proc. of TridentCom 2012, Greece, June 2012.
  • D. Trossen, X. Vasilakos, P. Flegkas, V. Sourlas and G. Parisis, "Mobility Work Re-Visited Not Considered Harmful", In Proc. of the IEEE WMCNT 2011, Budapest, Hungary, October 2011.
  • G. Parisis, G. Xylomenos and T. Apostolopoulos, "DHTbd: A Reliable Block-Based Storage System for High Performance Clusters", In Proc. of CCGrid 2011, Newport Beach, CA, USA, May 2011.
  • G. Parisis and D. Trossen, "Towards an implementation of an information-centric network", Euro-NF International Workshop on Traffic and Congestion Control for the Future Internet, Volos, Greece, March 2011.
  • G. Parisis, G. Xylomenos and D. Gritzalis, "BLAST: Off-the-shelf hardware for building an efficient hash-based cluster storage system", In Proc. of the 6th IFIP International Conference on Network and Parallel Computing (NPC 2009), Gold Coast, Australia.
  • G. Parisis and T. Apostolopoulos "A distributed hash table-based approach for providing a file system neutral, robust and resilient storage infrastructure", In Proc. of NGI2009, Aveiro, Portugal, July 2009.
  • G. Parisis, S. Arkoulis and T. Apostolopoulos, "An Open Architecture for Monitoring and Measuring QoS Indicators in Wireless Community Networks", In Proc. of NGI2008, Krakow, Poland, pages 284-291, April 2008.
  • A. Kousaridas, G. Parisis and T. Apostolopoulos. "Mobile Financial Services: A scenario-driven requirements' analysis". In Proc. of WEBIST 2007, Barcelona, Spain, 2007.


Research Projects

InnovateUK KTP with Moogsoft Ltd., 2018
This project is about the development of a mathematical framework, and a computational implementation that can run on commodity hardware, for the efficient and scalable calculation of the metrics associated with the logical and physical graphs inherent in IT infrastructures.

Sussex Research Development Fund (RDF), 2015
This project built on existing, community-driven work on packet-level network simulations, in order to develop a platform for experimenting with network protocols in simulated data centre topologies.

Trilogy 2
A liquid system should ideally allow resources including bandwidth, storage and processing to be used by any application, whether they are contributed by network operators, data centre operators or end systems. In today’s Internet resource pools have limited scope and the net result is inefficient utilization of resources. Enabling Internet liquidity effectively creates “communicating vessels”, enabling larger resource pools and allowing applications to discover idle resources and use them. The main objective of Trilogy 2 is to unlock the value inherent in joining up the pools of liquidity in the Internet.

PURSUIT - Pursuing a pub/sub Internet
Design and Implementation of an Information-centric Network Architecture - Blackadder is the name of the open source prototype which has been developed in the context of PURSUIT.

EIFFEL Support Action
The EIFFEL initiative is a Support Action (SA) proposed for the 7th Framework Programme (FP7). The EIFFEL SA is all about mobilizing European researchers to discuss and debate on the future of the Internet towards the development of the future networked society.

"PENED 2003", financed by the Greek Secretariat of Research and Technology (GSRT) 2006-2009.
This project funded my research during my Ph.D.

Consultancy Projects

Technical Support Consultant for the Development of Metropolitan Optical Fibre Networks in the Region of Northern Aegean, Greek Information Society, 3rd CSF, Measure 4.2, 2004 - 2009.

This project involved the design and supervision of the development of optical fibre metropolitan networks in three Greek islands (Chios, Samos and Mitilini). The MANs provide interconnection for the local networks of various public institutions (healthcare, administration, cultural). I was also involved in project management activities and coordination tasks. The project was funded by the Greek Information Society.

Member of a Consulting Committee for the Greek General Secretariat of Sports, Greek Ministry of Culture, 2006-2008.

I was member of a consulting committee for the Greek General Secretariat of Sports. Our goal was the design of a nationwide access management and ticketing system for the Greek football league. The proposed design involves the installation of a local network, turnstiles (with integrated ticket readers and Ethernet connectivity) and surveillance cameras in all Greek football stadiums.


  • MSc in Information Systems, Athens University of Economics and Business (as Adjunct Lecturer)
    • Mobile and Ubiquitous Systems (Spring Term, 2010)
  • Department of Informatics, Athens University of Economics and Business (as Teaching Assistant)
    • Communication Networks, Computer Networks, Programming in C++ (2005 - 2009)


June 2005 - June 2009

PhD, Department of Informatics, Athens University of Economics and Business
Thesis Title:: "Block-Level Storage in Structured Overlay Networks: The Design and Implementation of a Distributed Hash Table-based Storage System"
Supervising Committee: Prof T. Apostolopoulos, Associate Prof D. Gritzalis and Associate Prof G. Xylomenos

October 2003 - February 2005

MSc in Information Systems, Athens University of Economics and Business
Thesis Title: "Quality of Service provision in multimedia and multicast-based applications using open-source software"
Supervising Committee: Prof T. Apostolopoulos, Associate Prof V. Vassalos

October 1999 - June 2003

Degree in Informatics, Athens University of Economics and Business /strong>


Location: CHICHESTER 2 2R301
Email: G.A.Parisis@sussex.ac.uk
University Profile: http://www.sussex.ac.uk/profiles/334868
Telephone numbers
Internal: 8881
UK: 01273 678881
International: +44 1273 678881