Messaging Layer Security
| Abbreviation | MLS |
|---|---|
| First published | July 2023 |
| Organization | IETF |
| Authors |
|
| Domain | Security |
| Website | www |
Messaging Layer Security (MLS) is a security layer for end-to-end encrypting messages. It is maintained by the MLS working group of the Internet Engineering Task Force, and is designed to provide an efficient and practical security mechanism for groups as large as 50,000 and for those who access chat systems from multiple devices.[1][2][3]
Security properties
[edit]Security properties of MLS include message confidentiality, message integrity and authentication, membership authentication, asynchronicity, forward secrecy, post-compromise security, and scalability.[4]
History
[edit]The idea was born in 2016 and first discussed in an unofficial meeting during IETF 96 in Berlin with attendees from Wire, Mozilla and Cisco.[5]
Initial ideas were based on pairwise encryption for secure 1:1 and group communication. In 2017, an academic paper introducing Asynchronous Ratcheting Trees was published by the University of Oxford and Facebook setting the focus on more efficient encryption schemes.[6]
The first BoF took place in February 2018 at IETF 101 in London. The founding members are Mozilla, Facebook, Wire, Google, Twitter, University of Oxford, and INRIA.[7]
As of March 29, 2023, the IETF has approved publication of Messaging Layer Security (MLS) as a new standard.[8] It was officially published on July 19, 2023.[9][10] At that time, Google announced it intended to add MLS to the end to end encryption used by Google Messages over RCS.[11]
Matrix is one of the protocols declaring migration to MLS.[12]
Research on adding post-quantum cryptography (PQC) to MLS is ongoing, but MLS does not currently support PQC.[13][14][15]
Implementations
[edit]- OpenMLS: language: Rust, license: MIT
- MLS++: language: C++, license: BSD-2
- mls-rs: language: Rust, license: MIT, Apache 2.0
- MLS-TS: language: TypeScript, license: Apache 2.0
References
[edit]- ^ "Inside MLS, the New Protocol for Secure Enterprise Messaging". Dark Reading. 27 June 2019. Retrieved 2019-11-15.
- ^ at 10:29, Richard Chirgwin 22 Aug 2018. "Elders of internet hash out standards to grant encrypted message security for world+dog". www.theregister.co.uk. Retrieved 2019-11-15.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ "Messaging Layer Security". GitHub.
- ^ "Messaging Layer Security (mls) -". datatracker.ietf.org. Retrieved 2019-03-05.
- ^ "Das sind die sieben Entwickler-Trends 2019: Vom Java-Comeback über MLS bis KI/ML-zentrierte Technologien". IT Finanzmagazin. 2 January 2019. Retrieved 7 January 2019.
- ^ Cohn-Gordon, Katriel; Cremers, Cas; Garratt, Luke; Millican, Jon; Milner, Kevin (2017). "On Ends-to-Ends Encryption: Asynchronous Group Messaging with Strong Security Guarantees". Cryptology ePrint Archive.
- ^ Chirgwin, Richard (22 August 2018). "Elders of internet hash out standards to grant encrypted message security for world+dog". Retrieved 30 November 2018.
- ^ Sullivan, Nick; Turner, Sean (2023-03-29). "Messaging Layer Security: Secure and Usable End-to-End Encryption". IETF. Retrieved 2023-07-28.
- ^ "New MLS protocol provides groups better and more efficient security at Internet scale". 2023-07-19. Retrieved 2023-07-28.
- ^ Beurdouche, Benjamin; Vasquez, Sarah (2023-07-20). "Messaging Layer Security is now an internet standard". Mozilla. Retrieved 2023-07-28.
- ^ "An important step towards secure and interoperable messaging". Google Online Security Blog. Retrieved 2024-12-12.
- ^ "Are We MLS Yet?". Are We MLS Yet?. Retrieved 2024-09-23.
- ^ "Cryspen | Post-Quantum Group Messaging". cryspen.com. Retrieved 2024-12-12.
- ^ Hashimoto, Keitaro; Katsumata, Shuichi; Prest, Thomas (2022-11-07). "How to Hide MetaData in MLS-Like Secure Group Messaging: Simple, Modular, and Post-Quantum" (PDF). Cryptology ePrint Archive. Retrieved 2024-12-09.
- ^ "Post-quantum messaging: examining Apple's new PQ3 protocol". PQShield. 2024-02-22. Retrieved 2024-12-09.
External links
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