That's not the point! Signal is tying phone number to an IM identity. There is no need for that other then offering non-federated trackinghttps://twitter.com/whispersystems/status/807646087452364802 …
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I see. So what is the app doing exactly with the address book permissions it demands? Sending nothing to a server?
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We don't store any info server-side like a full name or avatar icon, so app needs access to resolve those from addr book
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It's a simple Q: Do you or do you not send or store any information derived from the address book to a server?
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Yes, truncated hash lookups are transmitted. Never stored.
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OK! Now can these truncated hashes be inverted back into telephone numbers?
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@thorsheim@whispersystems@letoams Of course they can. -
Thanks,
@matthew_d_green that was my point.@thorsheim@whispersystems@letoams -
Forgive my ignorance, arent trunc'd hashes supposed to induce collisions to make invert hard?
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