The Messaging Layer Security (MLS) protocol, developed by the IETF with support from the GSM Association, is a secure group messaging standard that is already live on hundreds of millions of devices. While not exclusively a quantum computing standard, MLS was specifically designed to easily integrate future quantum-resistant encryption as those technologies mature. It currently has full deployment status across major apps and the latest cross-platform RCS messaging updates, with planned upgrades for quantum-ready security expected in the coming years but without a fixed release date.
Technically, MLS protects group conversations by letting users verify who is in a chat and approve new members through simple group agreement, ensuring messages stay private across Android and iPhone platforms. Because the protocol is built to be easily updated, it can incorporate stronger, future-proof encryption methods without requiring a complete system overhaul. This flexible design positions MLS as a ready foundation for mainstream digital communication, helping everyday messaging services prepare for potential security threats posed by advancing quantum computers while delivering reliable privacy today.
Source: https://www.ietf.org/blog/rcs-adopts-mls/
Keywords: Messaging Layer Security, end-to-end encryption, quantum attack-resistant ciphersuites
