MHcast: Metadata-Hiding Multicast With Resilience Against Malicious Clients and Servers

MHcast is a system that hides metadata (information like who is sending and receiving messages) in multicast communications (sending messages to multiple recipients at once), while also protecting against malicious clients and servers that might try to break the system or reveal identities. The system uses distributed comparison functions and access control to prevent attacks and can deliver messages much faster than existing metadata-hiding systems, especially when sending to larger groups of recipients.