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Paul Ohm
Works at University of Colorado Law School
Lived in Boulder, CO
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Paul Ohm

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When someone posts something to a "Limited" audience that includes me, I can click on the word Limited and see up to 21 of the other people in the audience as well as the total count. And, it seems like the list o' 21 is randomized, so that I will see different subsets each time, even when the poster uses the same set of circles.

So, question: if I keep taking note of a particular user's lists of 21, shouldn't I after a while be able to start to reverse engineer the contents of many (if not all) of that user's circles? Obviously, I'll never know for sure the names the person has assigned to any particular list (although I may be able to guess), but I probably can tell that person X put me in a different circle from person Y, and that my circle contains people A, B, and C, and Y's circle contains people D, E, and F.

I'm not saying this is a privacy breach. I'm just wondering if Google gave any thought to this and has tried to implement any countermeasures.
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Vince T's profile photoDanilo Doneda's profile photoBruno Magrani's profile photoHelena Martins's profile photo
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+Joseph Lorenzo Hall: Fixed, unless that change gives the mis-impression that such things are more private than they are. I guess we're all still in the early-adopter phase, so we don't need to worry so much about the overlap loops of user feedback and technical change. Interesting to watch!
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Paul Ohm

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Initial impressions, one hour in: The rules about the way information flows in G+ make a great deal of intuitive sense. I have never said this about FB, because of its bewildering (and too-rapidly changing) rules of information flow, which I have never completely wrapped my head around. I hate FB, and I don't really use it. So far, I don't hate G+.
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Berin Szoka's profile photoSteven Bellovin's profile photoJoseph Lorenzo Hall's profile photoAndrea Matwyshyn's profile photo
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Ah you're right! It requires a(n unintuitive) rollover.
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People
Have him in circles
482 people
Danilo Doneda's profile photo
Michael Weems's profile photo
Peace Freedom Prosperity.com's profile photo
Christopher Wolf's profile photo
Greg Lastowka's profile photo
Ryan Zehl's profile photo
obi clint's profile photo
Elaine Bussjaeger's profile photo
Nikita Borisov's profile photo
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Law Professor
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  • University of Colorado Law School
    Associate Professor, present
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Law Professor and Occasional Coder
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