Rollercoaster: An Efficient Group-Multicast Scheme for Mix Networks, Daniel Hugenroth (Uni Camridge)

Talk by Daniel Hugenroth (University of Cambridge)
Abstract: In his talk, Daniel will present Rollercoaster, an efficient multicast scheme for Loopix-style mix networks. Such designs typically suffer from high delays when sending many messages to multiple recipients, which limits their scalability in decentralized collaborative apps. Rollercoaster reduces the time for delivering messages to all m members of a group to O(logm), without modifying the underlying mix network. It leverages the existing anonymity set and can handle unreliable group members while maintaining the same asymptotic guarantees.