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Fastwords

Fastwords. Markus Jakobsson Ruj Akavipat. A Bit about Authentication. Difficulty customizing settings. Difficulty authenticating. Short battery life. Lack of coverage. 1 2 3 4 5.

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Fastwords

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  1. Fastwords Markus Jakobsson RujAkavipat

  2. A Bit about Authentication Difficulty customizing settings Difficulty authenticating Short battery life Lack of coverage 1 2 3 4 5 Slow Web connection Poor voice quality Small screen size

  3. Problems • People hate passwords – especially on handsets • Slow to enter … • … and then you realize you mistyped something! • At the same time, recall rates are low for passwords • … and reset is difficult / insecure / expensive • PINs are faster … • … but not very secure • … and reuse is rampant Jakobsson/Akavipat: www.fastword.me

  4. Understanding usability issues Q. Why are passwords more painful than text? A. Text uses auto-correction/completion! Jakobsson/Akavipat: www.fastword.me

  5. Understanding recall issues Q. Why are (good) passwords hard to recall? A. Good passwords are weird! (Ebbinghausen, 1885) Jakobsson/Akavipat: www.fastword.me

  6. A stab at a solution Not so secure, you say? Approx. 64k words only. frog frof fro fr f frof Auto correct works Jakobsson/Akavipat: www.fastword.me

  7. Improved solution frog flat work Auto correct works Jakobsson/Akavipat: www.fastword.me

  8. Looking at speed Jakobsson/Akavipat: www.fastword.me

  9. Looking at security Average fastword Average password Jakobsson/Akavipat: www.fastword.me

  10. Forgot fastword? Hint: first word EFFECTIVE RECALL: 0.36+(1-0.36)*0.48=0.67 …. 67% Jakobsson/Akavipat: www.fastword.me

  11. Forgot fastword? Hint: first word Average password Average fastword Jakobsson/Akavipat: www.fastword.me

  12. Big-picture insight We can improve as basic things as passwords – if we ask “why”. Jakobsson/Akavipat: www.fastword.me

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