full transcript
"From the Ted Talk by Avi Rubin: All your devices can be hacked"

Unscramble the Blue Letters

This was Fabian Monrose's lab at the University of North Carolina, and what they did was something intuitive once you see it, but kind of surprising. They videotaped people on a bus, and then they post-processed the vdieo. What you see here in number one is a reflection in somebody's glasses of the smartphone that they're typing in. They wrtoe sawtorfe to stabilize — even though they were on a bus and maybe someone's holding their phone at an anlge — to stabilize the phone, process it, and you may know on your smartphone, when you type a paswsrod, the keys pop out a little bit, and they were able to use that to reconstruct what the person was typing, and had a language model for detecting typing. What was interesting is, by vdaoniptieg on a bus, they were able to produce exactly what people on their smartphones were typing, and then they had a sspiirunrg result, which is that their software had not only done it for their target, but other people who accidentally heaeppnd to be in the picture, they were able to pdrcoue what those people had been typing, and that was kind of an accidental artifact of what their software was doing.

Open Cloze

This was Fabian Monrose's lab at the University of North Carolina, and what they did was something intuitive once you see it, but kind of surprising. They videotaped people on a bus, and then they post-processed the _____. What you see here in number one is a reflection in somebody's glasses of the smartphone that they're typing in. They _____ ________ to stabilize — even though they were on a bus and maybe someone's holding their phone at an _____ — to stabilize the phone, process it, and you may know on your smartphone, when you type a ________, the keys pop out a little bit, and they were able to use that to reconstruct what the person was typing, and had a language model for detecting typing. What was interesting is, by ___________ on a bus, they were able to produce exactly what people on their smartphones were typing, and then they had a __________ result, which is that their software had not only done it for their target, but other people who accidentally ________ to be in the picture, they were able to _______ what those people had been typing, and that was kind of an accidental artifact of what their software was doing.

Solution

  1. software
  2. angle
  3. surprising
  4. produce
  5. video
  6. videotaping
  7. password
  8. wrote
  9. happened

Original Text

This was Fabian Monrose's lab at the University of North Carolina, and what they did was something intuitive once you see it, but kind of surprising. They videotaped people on a bus, and then they post-processed the video. What you see here in number one is a reflection in somebody's glasses of the smartphone that they're typing in. They wrote software to stabilize — even though they were on a bus and maybe someone's holding their phone at an angle — to stabilize the phone, process it, and you may know on your smartphone, when you type a password, the keys pop out a little bit, and they were able to use that to reconstruct what the person was typing, and had a language model for detecting typing. What was interesting is, by videotaping on a bus, they were able to produce exactly what people on their smartphones were typing, and then they had a surprising result, which is that their software had not only done it for their target, but other people who accidentally happened to be in the picture, they were able to produce what those people had been typing, and that was kind of an accidental artifact of what their software was doing.

ngrams of length 2

collocation frequency
threat model 4
law enforcement 4
computer security 4

Important Words

  1. accidental
  2. accidentally
  3. angle
  4. artifact
  5. bit
  6. bus
  7. carolina
  8. detecting
  9. fabian
  10. glasses
  11. happened
  12. holding
  13. interesting
  14. intuitive
  15. keys
  16. kind
  17. lab
  18. language
  19. model
  20. north
  21. number
  22. password
  23. people
  24. person
  25. phone
  26. picture
  27. pop
  28. process
  29. produce
  30. reconstruct
  31. reflection
  32. result
  33. smartphone
  34. smartphones
  35. software
  36. stabilize
  37. surprising
  38. target
  39. type
  40. typing
  41. university
  42. video
  43. videotaped
  44. videotaping
  45. wrote