The Key Lattice Framework for Concurrent Group Messaging

ePrint Report: The Key Lattice Framework for Concurrent Group Messaging

Kelong Cong, Karim Eldefrawy, Nigel P. Smart, Ben Terner

Today, two-party secure messaging is well-understood and widely adopted on the Internet, e.g., Signal and WhatsApp. Multiparty protocols for secure group messaging on the other hand are less mature and many protocols with different tradeoffs exist. Generally, such protocols require parties to first agree on a shared secret group key and then periodically update it while preserving forward secrecy (FS) and …

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