Fault-Tolerant Distributed Consensus in Synchronous Networks

Arpita Patra: Arpita Patra is presently an Associate Professor at the Indian Institute of Science.   She previously held several industry positions, such as (a) visiting faculty at Silence Laboratories, Singapore, in the summer of 2024 and (b) visiting faculty researcher at Google Research between 2022-2023. Her area of interest is Cryptography, focusing on theoretical and practical aspects of secure multiparty computation protocols. She received her PhD from the Indian Institute of Technology (IIT), Madras and held post-doctoral positions at the University of Bristol, UK, ETH Zurich, Switzerland, and Aarhus University, Denmark.  Her research has been recognized with the Prof. S. K. Chatterjee Award for Outstanding Woman Researcher or Industry Leader 2023 by IISc (2023), Google Privacy Research Faculty Award 2023, J P Morgan Chase Faculty Award 2022, SONY Faculty Innovation Award 2021, Google Research Award 2020,  NASI Young Scientist Platinum Jubilee Award 2018,   SERB Women Excellence award 2016,  INAE Young Engineer award 2016 and associateships with various scientific bodies such as Indian Academy of Sciences (IAS), Indian National Academy of Engineering (INAE), The World Academy of Sciences (TWAS) and Indian Association for Research in Computing Science (IARCS). She has co-authored a research monogram on Multi-party Computation titled “Secure Multiparty Computation against Passive Adversaries”.  Ashish Choudhury: Ashish Choudhury received his PhD in Computer Science from IIT Madras, India. He held postdoctoral positions at the University of Bristol and the Indian Statistical Institute. Dr. Choudhury received the Infosys Foundation Career Development Chair Professor award and the Visvesvaraya Young Faculty Research Fellow award. He has been selected for the ACM India eminent speaker program. His research interest is in the theoretical aspect of cryptography, with a special focus on designing and analyzing multi-party computation protocols. He has offered multiple courses on cryptography and secure multiparty computation on NPTEL, a project funded by the Govt. of India, which offers free online courses in various science and engineering disciplines. He has co-authored a book titled "Secure Multi-Party Computation Against Passive Adversaries".

• Introduction to fault tolerant distributed consensus.- Preliminaries.- EIG protocol for reliable broadcast.- Efficient consensus protocols.- Domain extension for consensus protocols with perfect security.- Lower Bound on the resilience of Byzantine agreement without any set up.- Byzantine broadcast with a trusted PKI set up.- Domain extension for consensus protocols with cryptographic and statistical security.- Lower bound for the number of rounds for deterministic consensus protocols.- Randomized consensus protocols.- Instantiating common-coin and leader election from scratch.- Lower Bound on the Message Complexity of Consensus/Broadcast.