Manufacturer Usage Description for TLS and DTLS Profiles for Internet of Things Devices
RFC 9761, “Manufacturer Usage Description for TLS and DTLS Profiles for Internet of Things Devices”, is a Proposed Standard document published in April 2025 by T. Reddy.K, D. Wing, B. Anderson. The canonical text is published by the RFC Editor.
Abstract
This memo extends the Manufacturer Usage Description (MUD) specification to allow manufacturers to define TLS and DTLS profile parameters. This allows a network security service to identify unexpected (D)TLS usage, which can indicate the presence of unauthorized software, malware, or security policy-violating traffic on an endpoint.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9761 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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