Research

My current and past research activities

Wireless devices and privacy

More and more objects are equipped with wireless communications interfaces. The radio signal emitted by those devices can be easily collected and, in some cases, used to obtain private information about the owner.

Inferring personnal information from Wi-Fi communications

WiFi enable devices such as smart-phones, tablets and laptops, store and broadcast information related to their Wi-Fi configuration and connection history. Based on this information, it is possible to infer personal information such as identity, social links or visited places.

  • SSIDs in the Wild: Extracting Semantic Information from WiFi SSIDs, Local Computer Networks (LCN), 2015 [link]
  • Short: Device-to-Identity Linking Attack Using Targeted Wi-Fi Geolocation Spoofing. ACM WiSec 2015, [link]
  • I know who you will meet this evening! Linking wireless devices using Wi-Fi probe requests. WoWMoM 2012 [link]
  • Linking wireless devices using information contained in Wi-Fi probe requests. Pervasive and Mobile Computing, 2013. [link]
  • Inferring User Relationship from Hidden Information in WLANs, MILCOM 2012 [link]

Wi-Fi Tracking

Wi-Fi enabled devices are broadcasting frames containing their MAC address as long as the Wi-Fi is on. The MAC address is a unique identifier that can be used to track individuals for marketing or surveillance purposes.

  • Why MAC Address Randomization is not Enough: An Analysis of Wi-Fi Network Discovery Mechanisms. ACM AsiaCCS 2016 . [pdf]
    • DEMO: Panoptiphone: How Unique is Your Wi-Fi Device? ACM WiSec 2016. [link]
  • Defeating MAC Address Randomization Through Timing Attacks. ACM WiSec 2016. [link]
  • Large Scale Wi-Fi tracking using a Botnet of Wireless Routers. Workshop on Surveillance & Technology, 2015. [link]
  • Analysing the privacy policies of Wi-Fi trackers, Workshop on Physical Analytics, ACM, 2014 [link]
  • I know your MAC address: targeted tracking of individual using Wi-Fi. Journal of Computer Virology and Hacking Techniques 2013 [link]

General Privacy issues

Some general thoughts on the privacy issues related to the Wi-Fi technology.

  • Tracage Wi-Fi, applications et contre-mesures C. Matte, M. Cunche, Gnu/Linux Magazine HS 84 (2016) [FR] [link]
  • Smartphone, Wi-Fi et vie privée : comment votre smartphone peut se révéler être votre pire ennemi, M.Cunche, Multi-system & Internet Security Cookbook (MISC), 8 (2013) [FR][link]
  • Quand les terminaux mobiles jouent les mouchards de poche, M. CunchePodcast Interstices (2013) [FR] [link]

Software

  • gtk-wifiscanner: a tool displaying in live information gathered from Wi-Fi probe requests.

Anonymity & Censorphip on the Internet

As a way to publish, exchange and accessed any kind of information, the Internet is often considered as a pontential threat by some governements and organisations. The Internet communication are therefore monitored and sometime censored. A way to evade this monitoring is to use anonymous communication systems.

  • Why are they hiding ? Study of an Anonymous File Sharing System. M. Cunche, M.-A. Kaafar, T. Chen, R. Boreli, A. Mahanti, ESTEL-SEC 2012 [link]
  • Censorship in the Wild: Analyzing Web Filtering in Syria, A. Chaabane, M. Cunche, T. Chen, A. Friedman, E. De Cristofaro, M.-A. Kafaar, arXiv, Feb 2014 [link]

Private data aggregation

Sensor networks collects information that can represent a threat to individuals’ privacy (e.g. energy consumption). Data aggregation have been proposed as a way to mitigate the privacy risks while enabling the collection of data.

  • Private and Resilient Data Aggregation, M. Cunche, C. Lauradoux, M. Minier, R. Boreli, LCN 2013 (Short Paper) [link]
  • Heterogeneous Secure Multi-Party Computation, M. Djatmiko, M. Cunche, R. Boreli, A. Seneviratne, NETWORKING 2012 [link]

Erasure correcting codes

Erasure correcting codes are a solution to make data transmissions resilient to packet loss. LDPC (low-density parity check) codes offer good erasure correction capabilities with a low en/decoding complexity.
  • Codes AL-FEC hautes performances pour les canaux à effacements : variations autour des codes LDPC, Mathieu Cunche, PhD Thesis, 2010 [link]
  • OpenFEC project: free, open, AL-FEC codes [link]