Boffins find increasing MAC address randomization protection with mobiles Share Copy In 2017, US Naval Academy researchers found that MAC address randomization in mobile devices was largely worthless as a privacy defense. Three years later, the same research group took another look and found that while there's been meaningful improvement, many phones still fail to effectively prevent MAC address-based tracking. The boffins' research paper, "Three Years Later: A Study of MAC Address Randomization In Mobile Devices And When It Succeeds," is scheduled to be presented at PETS, the Privacy Enhancing Technologies Symposium, in July, even though it will be four years later than the initial project [PDF].