A new Request for Comments is now available in online RFC libraries.
RFC 9797
Title: Randomized and Changing Media Access
Control (MAC) Addresses: Context, Network Impacts,
and Use Cases
Author: J. Henry,
Y. Lee
Status: Informational
Stream: IETF
Date: June 2025
Mailbox: [email protected],
[email protected]
Pages: 17
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-madinas-use-cases-19.txt
URL: https://www.rfc-editor.org/info/rfc9797
DOI: 10.17487/RFC9797
To limit the privacy issues created by the association between a
device, its traffic, its location, and its user in IEEE 802 networks,
client vendors and client OS vendors have started implementing Media
Access Control (MAC) address randomization. This technology is
particularly important in Wi-Fi networks (defined in IEEE 802.11) due
to the over-the-air medium and device mobility. When such
randomization happens, some in-network states may break, which may
affect network connectivity and user experience. At the same time,
devices may continue using other stable identifiers, defeating the
purpose of MAC address randomization.
This document lists various network environments and a range of
network services that may be affected by such randomization. This
document then examines settings where the user experience may be
affected by in-network state disruption. Last, this document examines
some existing frameworks that maintain user privacy while preserving
user quality of experience and network operation efficiency.
This document is a product of the MAC Address Device Identification for Network
and Application Services Working Group of the IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.
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