TreeSync: Authenticated Group Management for Messaging Layer Security

ePrint Report: TreeSync: Authenticated Group Management for Messaging Layer Security

Théophile Wallez, Jonathan Protzenko, Benjamin Beurdouche, Karthikeyan Bhargavan

Messaging Layer Security (MLS), currently undergoing standardization at the IETF, is an asynchronous group messaging protocol that aims to be efficient for large dynamic groups, while providing strong guarantees like forward secrecy (FS) and post-compromise security (PCS). While prior work on MLS has extensively studied its group key establishment component (called TreeKEM), many flaws in early designs of MLS have stemmed from …

eprint report management messaging security