RCM implementations differ based on the device and OS vendor these range from Wi-Fi sessions, time periods and associated SSIDs (network names), to name a few. RCM randomizes the MAC address, disabling the correlation between the device and the user because the same MAC address isn’t repeatedly used.
At that point, the malicious entity can use the Wi-Fi MAC address to track the user at future locations based on previously correlating the user’s device to the user.
Anyone with a Wi-Fi sniffer can identify the specific device and associate it with the user as he or she moves about (e.g., entering and leaving an area). When a user’s device is on a Wi-Fi network, the Wi-Fi MAC address is used as part of the transport protocol. This shift was previously discussed in an earlier CableLabs blog post titled “ MAC Address Randomization: How User Privacy Impacts Wi-Fi And Internet Service Providers. Device and OS vendors have started to implement RCM to negate this tracking risk for consumers. Functionality Impacts of Wi-Fi MAC RandomizationĪs privacy has become an increasing priority, addressing unwanted tracking of individuals and devices has become central to enhanced privacy efforts. It will wrap up by discussing the effects of RCM on beneficial tools and industry efforts to address those impacts through innovation and new technology development. This blog will discuss how the industry is enhancing users’ privacy while working to maintain legitimate functions that require a stable means of device identification. As Wi-Fi device and OS vendors move to implement Randomized and Changing MAC Address (RCM) to reduce or eliminate the ability to track users and their devices, related functionality costs on the Wi-Fi industry are emerging.
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