[SPARTA - bodies.dissemination-committee] Three accepted publications related to WP6.5 for INRIA partner

Dear all, This email is to inform you that my colleague Mathieu, who’s working in our PRIVATICS Inria team, has three publications related to WP6.5, all of them accepted for publication. These works have been done in the context of Guillaume C. PhD, work supported in part by SPARTA. All of them will be registered in the French HAL open access archive with the file (when camera ready will be available), regardless of the publisher practice. We have just added them to the official SPARTA-publications-data-management.xlsx file (it’s committed). Here is the information: - PoPETs2020 (https://www.petsymposium.org/ <https://www.petsymposium.org/>) "Discontinued Privacy: Personal Data Leaks in Apple Bluetooth-Low-Energy Continuity Protocols » Guillaume Celosia, Mathieu Cunche Abstract: Apple Continuity protocols are the underlying network component of Apple Continuity services which allow seamless nearby applications such as activity and file transfer, device pairing and sharing a network connection. Those protocols rely on Bluetooth Low Energy (BLE) to exchange information between devices: Apple Continuity messages are embedded in the payload of BLE advertisement packets that are periodically broadcasted by devices. Recently, Martin et al. identified [1] a number of privacy issues associated with Apple Continuity protocols; we show that this was just the tip of the iceberg and that Apple Continuity protocols leak a wide range of personal information. In this work, we present a thorough reverse engineering of Apple Continuity protocols that we use to uncover a collection of privacy leaks. We introduce new artifacts, including identifiers, counters and battery levels, that can be used for passive tracking, and describe a novel active tracking attack based on Handoff messages. Beyond tracking issues, we shed light on severe privacy flaws. First, in addition to the trivial exposure of device characteristics and status, we found that HomeKit accessories betray human activities in a smarthome. Then, we demonstrate that AirDrop and Nearby Action protocols can be leveraged by passive observers to recover email addresses and phone numbers of users. Finally, we exploit passive observations on the advertising traffic to infer Siri voice commands of a user. - IoT S&P 2019 (workshop CCS) (https://www.sigsac.org/ccs/CCS2019/index.php/ccs-2019-workshops/#WIOTSP <https://www.sigsac.org/ccs/CCS2019/index.php/ccs-2019-workshops/#WIOTSP>) "Fingerprinting Bluetooth-Low-Energy Devices Based on the Generic Attribute Profile » Guillaume Celosia, Mathieu Cunche Abstract: Bluetooth Low Energy (BLE) is a short range wireless technology included in many consumer devices such as smartphones, earphones and wristbands. As part of the Attribute (ATT) protocol, discover- able BLE devices expose a data structure called Generic Attribute (GATT) profile that describes supported features using concepts of services and characteristics. This profile can be accessed by any device in range and can expose users to privacy issues. In this paper, we discuss how the GATT profile can be used to cre- ate a fingerprint that can be exploited to circumvent anti-tracking features of the BLE standard (i.e. MAC address randomization). Leveraging a dataset of more than 13000 profiles, we analyze the potential of this fingerprint and show that it can be used to uniquely identify a number of devices. We also shed light on several issues where GATT profiles can be mined to infer sensitive information that can impact privacy of users. Finally, we suggest solutions to mitigate those issues. - Mobiquitous 2019 (http://mobiquitous.org/ <http://mobiquitous.org/>) "Saving Private Addresses: An Analysis of Privacy Issues in the Bluetooth-Low-Energy Advertising Mechanism" Guillaume Celosia, Mathieu Cunche Abstract: The Bluetooth Low Energy (BLE) protocol is being included in a growing number of connected objects such as fitness trackers and headphones. As part of the service discovery mechanism of BLE, devices announce themselves by broadcasting radio signals called advertisement packets that can be collected with off-the-shelf hardware and software. To avoid the risk of tracking based on those messages, BLE features an address randomization mechanism that substitutes the device address with random temporary pseudonyms, called Private addresses. In this paper, we analyze the privacy issues associated with the advertising mechanism of BLE, leveraging a large dataset of advertisement packets collected in the wild. First, we identified that some implementations fail at following the BLE specifications on the maximum lifetime and the uniform distribution of random identifiers. Furthermore, we found that the payload of the advertisement packet can hamper the randomization mechanism by exposing counters and static identifiers. In particular, we discovered that advertising data of Apple and Microsoft proximity protocols can be used to defeat the address randomization scheme. Finally, we discuss how some elements of advertising data can be leveraged to identify the type of device, exposing the owner to inventory attacks. Best regards, Vincent, Mathieu, Joost, Thomas