Talks, Presentations and Events

Trust Trackers for Computation Offloading in Edge Based IoT Networks

11 May 2021

Conference Presentation, IEEE INFOCOM, Virtual Event

Wireless Internet of Things (IoT) devices will be deployed to enable applications such as sensing and actuation. These devices are typically resource-constrained and are unable to perform resource-intensive computations. Therefore, these jobs need to be offloaded to resource-rich nodes at the edge of the IoT network for execution. However, the timeliness and correctness of edge nodes may not be trusted (such as during high network load or attack). In this presentation, we look at the applicability of trust for successful offloading. Traditionally, trust is computed at the application level, with suitable mechanisms to adjust for factors such as recency. However, these do not work well in IoT networks due to resource constraints. We propose a novel device called Trust Tracker (denoted by Σ) that provides higher-level applications with up-to-date trust information of the resource-rich nodes. We prove impossibility results regarding computation offloading and show that Σ is necessary and sufficient for correct offloading. We show that, Σ cannot be implemented even in a synchronous network and we compute the probability of offloading to a bad node, which we show to be negligible when a majority of nodes are correct. We perform a small-scale deployment to demonstrate our approach.

Trust Assessment in 32 KiB of RAM: Multi-application Trust-based Task Offloading for Resource-constrained IoT Nodes

22 March 2021

Conference Presentation, ACM Symposium of Applied Computing, Virtual Event, South Korea

There is an increasing demand for Internet of Things (IoT) systems comprised of resource-constrained sensor and actuator nodes executing increasingly complex applications, possibly simultaneously. IoT devices will not be able to execute computationally expensive tasks and will require more powerful computing nodes, called edge nodes, for such execution, in a process called computation offloading. When multiple powerful nodes are available, a selection problem arises: which edge node should a task be submitted to? This problem is even more acute when the system is subjected to attacks, such as DoS, or network perturbations such as system overload. In this presentation,a trust model-based system architecture for computation offloading is presented. The system architecture provides confidentiality, authentication and non-repudiation of messages in required scenarios and will operate within the resource constraints of embedded IoT nodes. The viability of the architecture is demonstrated with an example deployment of Beta Reputation System trust model on real hardware.

Towards Security Minded Verification: A Case Study of Cooperative Awareness Messages

06 November 2019

Talk, University of Coventry, Coventry, UK

I was invited to give a talk to Coventry University’s Institute for Future Transport and Cities on my work performed for FAIR-SPACE which investigated a formal verification of security properties of the generation of Cooperative Awareness Messages. One of the conclusions of this presentation was the difficulty of verifying non-functional security properties.

Orbit RRI Ethical Hackathon on Cyber Security

06 June 2019

Talk, Royal Holloway, University of London, Egham, UK

ORBIT’s aim is to promote Responsible Research and Innovation (RRI) to ensure the sustainability, acceptability and desirability of research. As part of this goal in June of 2019 they ran an Ethical Hackathon on Cyber Security of satellite systems. I was invited to give a guest talk on work applying formal verification to prove security properties of space systems being performed in the FAIR-SPACE hub. The summary of the event highlighted the depth understanding participants gained of RRI issues related to cyber security.

Competitive Advantage in the Digital Economy (CADE) Forum

20 May 2019

Event, University of Warwick in Venice, Venice, Italy

The Competitive Advantage in the Digital Economy (CADE) Forum aims to bring together academics and practitioners to discuss the challenges of the digital economy and present the latest cutting edge research. I was the Program Chair for the 2019 forum and that year the event focused on Smart Service Systems, Personal Data and Cyber Security. There were 28 speakers and 5 keynote speakers who gave presentations on a wide variety of topics. Funding to hold the event was obtained from a variety of sources, including winning funding from Warwick’s Institute of Advanced Study.

Warwick Postgraduate Colloquium in Computer Science

29 June 2018

Event, University of Warwick, Coventry, UK

The Warwick Postgraduate Colloquium in Computer Science (WPCCS) is a PhD student-run event which showcases the research performed by PhD students in the Department of Computer Science at the University of Warwick. I was chair of WPCCS 2016 and a member of the programme comittee for WPCCS 2017 and WPCCS 2018. Each year we received more presentations and posters submitted to the event as we tried to increase the event’s similarity to conferences PhD students would attend.

How To Stop Poachers Stealing Your Pandas

15 May 2018

Talk, Shop Front Theatre, Coventry, UK

Pint of Science is an annual event where researchers share their work in a informal context (the pub) with the general public. The aim of these events is to inform in a relaxed environment without. This talk presented on my researcher undertaken during my PhD and included a live demonstration of members of the public using a directional antenna to find the location of a small transmitter.