I gave a talk at ITU, Copenhagen

I visited Pinar Tözün’s group at ITU, Copenhagen and gave a lecture at the Advanced Data Systems seminar.

Cryptographically secure analytics in the Cloud

Abstract: Enabling secure outsourced analytics with practical performance has been a long-standing research challenge in the data management and systems communities. In this talk, I will present recent work that allows multiple data holders to contribute their data towards a joint analysis in the cloud, while keeping the data siloed even from the cloud providers. I will give an overview of the QueryShield service that offers secure relational and time series analytics as-a-service, using multi-party computation (MPC). QueryShield relies on two novel MPC systems developed in our lab: (i) the SECRECY system for relational analytics, that exposes the costs of oblivious queries to the planner and employs novel logical, physical, and protocol-specific optimizations, and (ii) the TVA system for time series analytics, that introduces protocols for secure window aggregation on private inputs with unordered and irregular timestamps. Finally, I will describe challenges and ongoing research efforts towards developing an expressive and scalable MPC analytics framework with configurable security guarantees.