Conveying the More Instant Messaging Interoperability Message ID
In modern messaging apps (like WhatsApp, Signal, or iMessage), each platform has its own way of identifying messages and securing them with cryptographic signatures. This makes interoperability — the ability of users on different apps to communicate securely — very difficult.
The IETF More Instant Messaging Interoperability (MIMI) Working Group is trying to solve this by standardizing how messaging systems communicate. Think of it as building a shared "language" and structure so different apps can exchange messages securely and meaningfully.