I'm currently a post-doctoral researcher in the Large-Scale Distributed Systems (LSDS) group of the Department of Computing, Imperial College London. Prior to joining Imperial I was a software engineer in the financial services industry building stream processing platforms for high-frequency trading. Before that I was a member of the OPERA group at the University of Cambridge Computer Laboratory, where I completed my PhD under Prof. Jean Bacon.
The best way to get in touch with me is via email at d.okeeffe at imperial dot ac dot uk.
My research interests lie broadly in the areas of distributed systems, security, databases, and networking, with a current focus on cloud computing security. In particular, as part of the SeReCa, SecureCloud and CloudSafetyNet projects I am investigating techniques for improving user control and visibility over sensitive data in cloud platforms.
In addition to cloud security, I have a strong interest in stream processing systems. My current research activities in this area are concentrated on the ITA-DSM project, which transplants popular "Big Data" stream processing platforms like Twitter Storm to wireless mobile and sensor network environments.