What is Messaging Layer Security (MLS)?
Summary
Messaging Layer Security (MLS) is an IETF-driven effort to provide a modern, efficient security layer for encrypting messages in groups of two or more. The project defines an architecture and a protocol (RFC 9420) and invites participation from developers and researchers, with multiple open-source implementations available. The article serves as an overview and a pointer to ongoing work and resources for adopting MLS in secure communications.