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Fastwords Markus Jakobsson Ruj Akavipat. A Bit about Authentication 2 1 2 3 4 5 Short battery life Slow Web connection Lack of coverage Poor voice quality.

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Presentation on theme: "Fastwords Markus Jakobsson Ruj Akavipat. A Bit about Authentication 2 1 2 3 4 5 Short battery life Slow Web connection Lack of coverage Poor voice quality."— Presentation transcript:

1 Fastwords Markus Jakobsson Ruj Akavipat

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

3 Jakobsson/Akavipat: Peopl e 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 Problems

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

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

6 Jakobsson/Akavipat: Not so secure, you say? Approx. 64k words only. Auto correct works frogfroffrofrffrof A stab at a solution

7 Jakobsson/Akavipat: Auto correct works frog flat work Improved solution

8 Jakobsson/Akavipat: Looking at speed

9 Jakobsson/Akavipat: Average password Average fastword Looking at security

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

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

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


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