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A comment on Show HN: Anonymous messaging with a 1km radius. Parent comment

Re:Show HN: Anonymous messaging with a 1km radius by 7952 on Thursday October 27, 2016 @11:38AM (#12805986)
Or increase the radius randomly after a pair of users have communicated for the first time.
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Re:Show HN: Anonymous messaging with a 1km radius by qq66 on Thursday October 27, 2016 @06:10PM (#12810752)
That's not sufficient because a hostile actor could have three phones with three accounts.
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