We did a thing. We combined TLS and MLS into a hybrid protocol. Of course, when things get serious, full names are in order: We combined the Transport Layer Security protocol and the Messaging Layer Security protocol. This blog post is about the why and the how.
Push notifications are a mechanism through which applications can send and display notifications to users of smartphones. The infrastructure that drives these notifications in the background is a complex mechanism and not without privacy issues.
The Messaging Layer Security protocol has been published as RFC 9420, a standard by the IETF. MLS is the first standardized and fully specified end-to-end encryption protocol. The specification is freely accessible, and its security has been analyzed in academic publications.
