‘Anonymous’ Chat App Hijacks Contact Data

Re:‘Anonymous’ Chat App Hijacks Contact Data by nfriedly on Thursday August 31, 2017 @10:04AM (#15140353)

I think it's much less likely to have collisions because the input space is so restricted (just valid phone numbers).

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Re:‘Anonymous’ Chat App Hijacks Contact Data by jsjohnst on Thursday August 31, 2017 @10:11AM (#15140415)

SHA-1 has approximately Random distribution, so it doesn't matter what the input is really in practice.

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Re:‘Anonymous’ Chat App Hijacks Contact Data by saurik on Thursday August 31, 2017 @10:50AM (#15140690)

The point of the person you are responding to essentially comes down to pidgeon hole principle (the best principle), and absolutely applies to a cryptographically random function, and is agnostic to the input distribution: it is a relative measure of information/entropy between two sets.

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Re:‘Anonymous’ Chat App Hijacks Contact Data by jsjohnst on Thursday August 31, 2017 @11:10AM (#15140844)

I agree with what you said, but I don't agree that's what the person implied by their post.

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