Combiners for Functional Encryption, Unconditionally

Explore the concept of combiners for functional encryption in this 22-minute conference talk presented at Eurocrypt 2020. Delve into the motivations behind studying cryptographic combiners and their applications in functional encryption. Examine the existing knowledge in the field and discover the new approach introduced by the researchers. Learn about function secret sharing, the construction of FE combiners, and the challenges faced in secure multi-party computation. Gain insights into input-local MPC and the concept of combiner-friendly HSS. Conclude with a summary of the key findings and their implications for the field of cryptography.

Intro
Why study cryptographic combiners?
Why study functional encryption (FE) combiners?
What was known?
This work
Starting Point: Function Secret Sharing
FE Combiner Construction
Combiner for Constant Number of Candidates
New Approach
Combiner-Friendly HSS
Secure Multi-party Computation
Input-Local MPC
Challenges
Summary