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About


I am a senior lecturer in the Department of Computing at the Open University, UK, having been appointed as a lecturer in October 2006. My research focuses on the practical problems associated with building and maintaining self-managing (adaptive) systems by combining rigorous formal techniques with concrete implementations and applications of those. My work on the formalization of policy-managed systems resulted in the PonderART framework for policy analysis and refinement. My interest in practical applications of formal techniques includes investigating the usability of technologies that apply such formalisms.

Motivated by the increasing use of mobile computing applications, my current research investigates ways in which machine-learning techniques can improve the privacy management capabilities for users of such applications, in projects such as PRiMMA (EPSRC Funded), Adaptive Privacy and Security (ERC Funded) and Adaptive Information Security (QNRF Funded).

I completed my PhD in Sep 2005 under the supervision of Dr. Emil Lupu and Dr. Alessandra Russo at Imperial College London, where I was also a research associate (2001-2006). Between 1998 and 2001 I worked as a Software Engineer for Sapient Corporation having obtained an MEng in Information Systems Engineering from Imperial College London in 1998.

Prior to that I was educated at Royton and Crompton School (Oldham, UK), Dharmaraja College (Kandy, Sri Lanka) and St. Thomas' College (Bandarawela, Sri Lanka)

Popular posts from this blog

Privacy Itch and Scratch

Ubiquitous computing technologies are being used to collect, process and share increasing amounts of personal information, from our location and physical activity levels to the things we buy and the web pages we read.  Although these developments have created a wealth of new applications that engage and entertain us, they also pose significant challenges for our privacy - particularly the challenge of maintaining awareness and control over our personal information flows as we go about our daily lives.

My colleagues, Vikram Mehta, Blaine Price and Bashar Nuseibeh, and I have been exploring new interaction metaphors for enhancing our privacy awareness and control.  Our earlier work in this area used haptic interactions through the users' smartphone to enable privacy controls to be configured by physically shaking and moving the device (PrivacyShake).   More recently we have been exploring the role of on-body interfaces to achieve more subtle and non-intrusive mechanisms for privacy …

Visual programming for 'wiring' the Internet of Things

There is a proliferation of devices being developed to form the building blocks of the Internet of Things (IoT), from Internet-connected power sockets and light bulbs to kettles, toasters and washing machines. However, to realise the full potential of the IoT, it will be necessary to allow these devices to interconnect and share data with each other to deliver the functionalities required by end-users. In recent research on end-user programming for the IoT, my colleagues Pierre Akiki, Yijun Yu and myself have proposed the notion of Visual Simple Transformations (ViSiT), that provides a visual programming paradigm for users to wire together IoT devices. The video above shows a demonstration of the ViSiT solution and full details of the approach will appear in an upcoming special issue of the ACM Transactions on Computer-Human Interaction (ToCHI).

This work is highlighted in a recent IEEE Software Blog: Empowering Users to Build IoT Software with a Puzzle-like Environment and full deta…

Privacy-by-Design Framework for Internet of Things Systems

IOT-2016 7-9 September, 2016, Stuttgart, Germany from Charith Perera
Recent DDoS attacks on key internet services, like the attack that affected the Dyn domain name service, highlighted the security challenges associated with the proliferation of insecure Internet of Things (IoT) systems.  This attack exploited common vulnerabilities like the use of default administration passwords on IoT devices such as internet-enabled CCTV cameras, internet-enabled appliances and smart home devices, to recruit over hundreds of thousands of nodes into a botnet.   This capability highlights the cyber security threats associated with the IoT and brings into sharp relief the importance of considering both security and privacy when designing these systems.

In recent work, presented at the Internet of Things Conference, we describe a privacy-by-design framework for assessing the privacy capabilities of IoT applications and platforms.  Building on more general design strategies for privacy in informaiton …