Threshold Signatures: Efficient Constructions and Applications in Blockchains

PhD Qualifying Examination


Title: "Threshold Signatures: Efficient Constructions and Applications in 
Blockchains"

by

Mr. Zhuo CAI


Abstract:

Threshold signature schemes are important cryptographic primitives. Due to its 
importance in distributed systems and real applications, threshold signatures 
have been studied since late 1980s. In recent years, threshold signatures 
received research attention again, with application in cryptocurrencies, 
because classical threshold signatures, such as BLS threshold signatures, are 
not practical for large-scale applications and dynamic distributed systems. 
Recent hot topics in threshold signatures include (1) succinct signatures using 
SNARKs, (2) efficient DKG setup protocols for threshold signatures, (3) 
applications of multi-signatures in blockchain applications and (4) adaptive 
security, minimal assumptions, and other theoretical aspects of threshold 
signatures. This survey presents the basic components of threshold signatures 
and discusses a few recent works on different directions. Finally, the survey 
suggests some new directions for future research.


Date:                   Tuesday, 30 April 2024

Time:                   3:00pm - 5:00pm

Venue:                  Room 5501
                        Lifts 25/26

Committee Members:      Dr. Amir Goharshady (Supervisor)
                        Dr. Dimitris Papadopoulos (Chairperson)
                        Prof. Ke Yi
                        Dr. Wei Wang