Security Cryptography Whatever cover image

Messaging Layer Security (MLS) with Raphael Robert

Security Cryptography Whatever

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The Spectrum of Ways to Design Secure Group Messaging Systems

The original signal way of doing it was essentially that if you wanted to create a group, you would come up with an unguessable secret just to get 128-bit numbers on what that. So MLS makes it possible to design secure membership protocols that don't depend on a server making same decisions about who's in the group. The one addition here is that when you receive a message, you also know, you know, who the sender thought they were sending it to.

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