Reducing Metadata Leakage in End-to-End Encrypted Messaging Using the Messaging Layer Security Protocol
Abstract
The Messaging Layer Security (MLS) protocol provides end-to-end encryption between groups of clients but requires two additional components: An authentication service (AS) that deals with client authentication and a delivery service (DS) that delivers group messages.The metadata required by the DS to distribute group messages to the individual members of a group, however, potentially allows acompromised DS to track clients across groups and identify membership and communication patterns of clients.This project aims to design a delivery service that fulfills the functional requirements set by the MLS protocol specification even in the context of resource-constrained devices and provides additional features such as message validation and access control while keeping as little metadata as possible.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 13, 2023
- Source ID
- N629092312089
Entities
People
- Raphael Robert
Organizations
- Office of Naval Research
- United States Navy