The 26th Annual CHI Conference on Human Factors in Computing Systems

Access Control by Testing for Shared Knowledge

author: Michael Toomim, University of Washington

Description

We propose sharers of photos, blogs, etc. protect content withconcise questions like “What is Dad’s favorite phrase?” ratherthan explicit authenticated white/blacklists. Tested via attack byMechanical Turk workers.

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*Slides*
0:00	Sharing our privates - Access Control by Testing for Shared Knowledge
0:20	computers are for socializing
1:04	We socialize by broadcasT
1:16	MOST OF LIFE IS SEMI-PRIVATE
2:13	Industrial Access Control: (1)
2:47	Industrial Access Control: (2)
3:42	Industrial Access Control: (3)
4:00	shared knowledge - defines a social clique (1)
4:12	shared knowledge - defines a social clique (2)
4:29	shared knowledge - defines a social clique (3)
4:47	shared knowledge - defines a social clique (4)
5:03	STudy
5:57	Who’s in? Who’s out?
6:46	Designing questions (1)
7:48	Designing questions (2)
8:25	Cracking the questions (1)
8:53	Cracking the questions (2)
9:43	Are sharers Aware of guessability?
10:15	The unexpectedly easy 6%
11:42	Let’s enable more semi-private social content to go online!
12:45	Ciao
14:39	- Questions
15:46	- Questions

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