This article investigates Message Layer Security (MLS), the IETF standard protocol (RFC 9420) for Signal-style end-to-end encryption. Through a practical analysis of OpenMLS (the Rust reference implementation) and a demonstration CLI chat application (mls-chat), the post reveals the substantial gap between protocol specification and production deployment. Introduction MLS (Message Layer …
What is Messaging Layer Security (MLS)?
Messaging Layer Security (MLS) is an IETF working group building a modern, efficient, secure group messaging protocol.
Introducing AT-SMS - blog.boscolo.co
Open End-to-End Encrypted Messaging on AT Protocol
Introducing AT-SMS - blog.boscolo.co
Open End-to-End Encrypted Messaging on AT Protocol
An End-to-End Encrypted Peer-to-Peer Chat System with Self-Sovereign Identity
Today, messaging applications are the most popular medium of communication over the Internet. As their use has grown, different security and privacy concerns have received the attention of users. Users consider what they send with others to be private, tamper-proof and secure without getting exposed to unintended entities. Furthermore, users are concerned whether their data is exposed if the service provider encounters any cyber attack. In this paper, we propose a Self-Sovereign Identity (SSI)-based End-to-End Encrypted Peer-to-Peer (E2EE P2P) chat system that does not rely on any specific provider, enhancing user privacy and security. The system leverages decentralized identifiers (DIDs) to establish secure communication channels using the DIDcomm (DID Communications) protocol, which ensures the privacy of user data. We also introduce a secure file sharing mechanism that ensures that all data, including messages, are stored solely on the user's device, further safeguarding user privacy. The system is developed following the Design Science Methodology, addressing probable threats and satisfying different functional and security requirements. The architecture and its implementation details are discussed with the subsequent use cases and protocol flow. Finally, we analyze different aspects of the system.
Integrating Germ with AT Protocol — Germ Network
End-to-end encrypted Germ DM is now a Bluesky messenger. In this technical post, we introduce the architecture of Germ’s integration with AT Protocol. From the beginning, Germ has been building for an interoperable E2EE ecosystem, and this extends to our integration with AT Protocol. We’ll define th
Making MLS more decentralized
It’s no secret that we at Phoenix R&D are big fans of the Messaging Layer Security (MLS) protocol, having helped it to come into existence. It’s a versatile group key agreement and messaging protocol that’s used to power both asynchronous and real-time applications. MLS is relatively
How to Use Signal Encrypted Messaging
The best end-to-end encrypted messaging app has a host of security features. Here are the ones you should care about.
Sharing a safety tool: announcing policyserv
Matrix, the open protocol for secure decentralised communications
ATSMS — end-to-end encrypted group messaging
Encrypted group messaging on AT Protocol identities, with no server ordering anything.
Discord DAVE Protocol Whitepaper
Whitepaper for Discord's Audio & Video End-to-End Encryption (DAVE) protocol
NLnet; Friendly Forge Format (F3)
Proposed Standard for secure communication between software forges
The 2026-07-28 Specification
The 2026-07-28 Model Context Protocol specification is out, bringing a stateless protocol core, Multi Round-Trip Requests, header-based routing, cacheable list results, authorization hardening, a formal extensions framework, and updated Tier 1 SDKs.
