Professional Details


I am currently the Chief Information Security Officer (CISO) at Careem, building ‘the everything app’ for the greater Middle East, with operations in over 100 cities, covering 12 countries across the Middle East, Africa, and South Asia regions.

I am a Cybersecurity Council Member of KuppingerCole Analysts AG.


Before this, as Chief Strategy Officer of Axiomatics, I worked with the Board, the CEO and executive leadership team to develop the growth strategy, identify and prioritize strategic investment opportunities, and define the innovation agenda for the company. Axiomatics is the worl's leading independent provider of dynamic authorization solutions. A few years before this I was also the Chief Product Officer, responsible for the overall vision, planning and delivery of our products.

I served on the External Advisory Board of Institute of Cyber Security for Society (iCSS), University of Kent and on the Technology Advisory Board of UCON Project, a join project between Huawei GmbH and fortiss GmbH.

I was the Group Technlogy Product Manager at's cyber security department managing the vision, strategy and delivery of cyber security products including enterprise IAM, data security, production platform security, endpoint security and attack detection and response capabilities. I also led the redesign of the global customer and partner identity system platform and account security capability of

As a Principal Researcher at Security Research Practice of British Telecom (BT), I researched security aspects of virtualisation, cloud-based delivery model and other SOA/SOI related security issues.

I was the Fellow of Cyber Strategy Studies at The Takshashila Institution. Cyber Strategy Studies aims to look at the strategic technological and policy doctrines associated with cyber power and cyber security from an Indian perspective. I contributed on and off to Pragati, the flagship magazine of the Institution and also blogged at Vyūha on related issues.

I am also the co-founder of MyZenith, The Applied Reading Platform.

My LinkedIn profile has more details.

Ph.D. years

I obtained my Ph.D. in Computer Science from Vrije Universiteit, Amsterdam, The Netherlands. The research carried out was in the area of distributed policy enforcement, secure computing, privacy, accountability and system & network security. My PhD advisers were Prof. Andrew S. Tanenbaum and Associate Prof. Bruno Crispo. The Ph.D. dissertation, titled "Remote Policy Enforcement Using Java Virtual Machine", is available for download (PDF).

While at VU, I led several projects - Trishul, DRM Paradiso and Floodgate. I also surprivised several Masters students' project work as well as taught several practicals courses.

More details on the work can be found in the archive of the university hosted site as well as the GitHub repositories with code and publicaion archives.



A list of my academic and non-academic publications can be found in the publications section. My DBLP listing, ACM profile and Research Gate profile also provide details of some of the publications.





I have helped supervise the following students' PhD/Masters project:

Refereed Publications

Technical Reports

Non-Refereed Publications

Book Reviews

Featured reviewer at ACM ACM Computing Reviews

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