Devices That Tell On You: Privacy Trends in Consumer Ubiquitous Computing T. Scott Saponas Jonathan Lester Carl Hartung Sameer Agarwal Tadayoshi Kohno.

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Presentation transcript:

Devices That Tell On You: Privacy Trends in Consumer Ubiquitous Computing T. Scott Saponas Jonathan Lester Carl Hartung Sameer Agarwal Tadayoshi Kohno August 8, th USENIX Security Symposium

Old Technology: Known Privacy Issues

New Technology: “Unknown” Privacy Issues

RFIDEEG Gaminglarge displaysmobile sensing platforms wearablesHealth displayssmar t phonesambient displays New Technology: “Unknown” Privacy Issues

Nike+iPod Sport Kit Slingbox

unique identifier

spoofed MAC Alice Unwanted Music & Pictures Bob block Interesting Music & Pictures Bob

Strong Identifiers Weak Identifiers Tracking Location Evading Blocking

Slingbox Streams (encrypted) Media

Variable Data Rate Encoding Slingbox

Movie Fingerprint From Throughput 100 ms throughput5 sec throughput trace 1 trace 2 trace 3

Collected 26 Movies Traces

Throughput for Content Identification unaligned tracesaligned tracesaverage trace movie signature query query signature sliding window distance minimum distance

26 Movie Experiment Movie ABad Boys BBad Boys II CBourne Supremacy DBreak-Up EHarry Potter FHarry Potter III GIncredibles HMen in Black II IOcean's Eleven JShort Circuit KX2 LX-Men MAir Force One NBourne Identity OCaddy Shack PClueless QHappy Gilmore RJurassic Park S Nightmare Before Christmas TOffice Space URed October VAustin Powers WAustin Powers II XBruce Almighty YHurrican ZShort Circuit II best match Compare movie database 12… 50 ERROR

VBR Leaks Information 10 Min: 62% true positive (chance 4%) 40 Min: 77% true positive (chance 4%) 40 Min: 15 movies ≥ 98% true positive 10 Minute40 Minute

VBR Leaks Information Encryption is Not Enough – Traffic Analysis – Throughput Fingerprint Limitations – 26 movie library – Lab setting Extensions – Recognizing specific movies – Watermarking

Thanks! Acknowledgements: Yaw Anokwa, Kate Everitt, Kevin Fu, J. Alex Halderman, Karl Koscher, Ed Lazowska, David Molnar, Fabian Monrose, Lincoln Ritter, Avi Rubin, Jason Schultz, Adam Stubblefield, Dan Wallach, and David Wetherall T. Scott Saponas, Jonathan Lester, Carl Hartung, Sameer Agarwal, Tadayoshi Kohno