Imperial College London


Faculty of EngineeringDepartment of Computing




+44 (0)20 7594 8237s.demetriou Website CV




Mrs Marina Hall +44 (0)20 7594 8259




353ACE ExtensionSouth Kensington Campus





I am a Lecturer at the Department of Computing at Imperial College London and the Director of the APlications and Systems Security Lab (apss). 

Have you ever wondered how advertisers know that you are interested in that pair of shoes before you do? Have you heard about that baby monitor hacked to spy on toddlers? Did you know that researchers took remote control of a connected vehicle's steering and braking functionality? Is your smartphone a spying device waiting to be exploited? 

In my work I study such security and privacy issues, especially with respect to emerging application domains, such as smartphones and the Internet of Things. I find problems with such systems and propose alternative designs to eradicate them.

You can read more about our work at our Lab's website: apss@Imperial.

I currently have open positions for motivated PhD students excited about smartphone and IoT security. Research experience in this or similar area is preferred. If you are interested, please send me an email using “Prospective Security PhD Student” as subject.

Selected Publications


Demetriou S, Jain P, Han K-H, 2018, CoDrive: improving automobile positioning via collaborative driving, IEEE Conference on Computer Communications (INFOCOM), IEEE

Tuncay GS, Demetriou S, Ganju K, et al., 2018, Resolving the predicament of android custom permissions, Network and Distributed System Security Symposium, Internet Society

Demetriou S, Zhang N, Lee Y, et al., 2017, HanGuard: SDN-driven protection of smart home WiFi devices from malicious mobile apps, Pages:122-133

Demetriou S, Merrill W, Yang W, et al., Free for all! Assessing user data exposure to advertising libraries on android, Network and Distributed System Security (NDSS) Symposium

Demetriou S, Zhou X, Naveed M, et al., What’s in Your Dongle and Bank Account? Mandatory and Discretionary Protection of Android External Resources, Network and Distributed System Security Symposium

Zhou X, Demetriou S, He D, et al., 2013, Identity, location, disease and more: Inferring your secrets from android public resources, Pages:1017-1028, ISSN:1543-7221

More Publications