Fastwords
description
Transcript of Fastwords
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FastwordsMarkus Jakobsson
Ruj Akavipat
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A Bit about Authentication
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Short battery life
Slow Web connection
Lack of coverage
Poor voice quality
Small screen
size
Difficulty customizing
settings
Difficulty authenticating
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Jakobsson/Akavipat: www.fastword.me
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
Problems
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Jakobsson/Akavipat: www.fastword.me
Q. Why are passwords more painful than text? A. Text uses auto-correction/completion!
Understanding usability issues
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Jakobsson/Akavipat: www.fastword.me
Q. Why are (good) passwords hard to recall? A. Good passwords are weird!
(Ebbinghausen, 1885)
Understanding recall issues
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Jakobsson/Akavipat: www.fastword.me
Not so secure, you say?Approx. 64k words only.
Auto correct works
frogfroffrofrffrof
A stab at a solution
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Jakobsson/Akavipat: www.fastword.me
Auto correct works
frog flat work
Improved solution
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Jakobsson/Akavipat: www.fastword.me
Looking at speed
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Jakobsson/Akavipat: www.fastword.me
Average password
Average fastword
Looking at security
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Jakobsson/Akavipat: www.fastword.meEFFECTIVE RECALL: 0.36+(1-0.36)*0.48=0.67 …. 67%
Forgot fastword? Hint: first word
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Jakobsson/Akavipat: www.fastword.me
Average fastword
Average password
Forgot fastword? Hint: first word
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We can improve as basic things as passwords – if we ask “why”.
Jakobsson/Akavipat: www.fastword.me
Big-picture insight