1. MAC Address Randomization Tests Date: [2014-10-22] Authors: NameAffiliationPhoneEmail Fabio GiustUC3Mfgiust@it.uc3m.es Carlos Jesús BernardosUC3Mcjbc@it.uc3m.es Antonio de la OlivaUC3Maoliva@it.uc3m.es Notice: This document does not represent the agreed view of the IEEE 802 EC Privacy Recommendation SG. It represents only the views of the participants listed in the ‘Authors:’ field above. It is offered as a basis for discussion. It is not binding on the contributor, who reserve the right to add, amend or withdraw material contained herein. Copyright policy: The contributor is familiar with the IEEE-SA Copyright Policy.http://standards.ieee.org/IPR/copyrightpolicy.html Patent policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Abstract The present document introduces the test already performed for MAC randomization and the proceedings to update the IEEE 802 Privacy ECSG Wiki

2. IEEE 802 Privacy Recommendation Study Group MAC Address Randomization Tests Wiki platform http://oruga.it.uc3m.es/802-privacy/index.php/Main_Page

3. Wiki’s Objective Collects the tests on MAC randomization tools – Target platform (OS, driver, …) – Type of MAC generated by the tool Manually set Random set Number of changeable bits – Notes and usage instructions http://oruga.it.uc3m.es/802-privacy/index.php/Main_Page

4. Wiki usage Wiki usage policy – Registered users only can post new content Non-registered users can only browse the wiki – Registrations are moderated by the wiki’s admin This prevents undesired changes on the pages

5. Wiki’s Status (i) Results on – GNU/Linux (Ubuntu 14.04) platform – Intel wireless card (iwlwifi/iwldvm drivers) – Apple OSX 10.7.5 – Android 4.2.2 Custom (qcom drivers) Tested tools – ip (from iproute2 package) (GNU/Linux) – Ifconfig (GNU/Linux) – Macchanger (GNU/Linux) – SpoofMac (Mac OS - GNU/Linux) – Network-Manager (GNU/Linux) – Pry-Fi (Android 4.2+)

6. Wiki’s Status (ii) Summary of the results – ip and ifconfig are the basic GNU/Linux tools importing libraries for system manipulation (ioctl and netlink) – The others are built on top of ip and ifconfig – In all cases MAC address cannot be changed if the wireless interface is “up” – Pry-Fi for Android 4.2+ – The new MAC address is not used by the system when actually transmitting frames (Pry-Fi tool) – SpoofMac on OSX 10.7.5 – Randomizes the lower 24 bits and uses the VMWare OUI – It allows setting the the U/L bit

7. Wiki’s status (iii) Summary of the results (cont’d) – Apple iOS8 apparently contains a feature to randomize the MAC address Tests on iPhone 4s, iPhone 5s and iPad Mini v1 do not confirm the tool usability – PowerShell script for MS W7 and later Requires reloading the driver – wpa_supplicant The current dev branch snapshot includes experimental support for randomizing the local MAC address for both pre-association (active scan and GAS/ANQP while not connected) and connected cases