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A comment on Twitter says an attacker used its API to match usernames to phone numbers. Parent comment

Re:Twitter says an attacker used its API to match usernames ... by what_ever on Wednesday February 05, 2020 @11:47PM (#22253498)
Whatsapp has 1.5B MAU. I don't think people are interested in adding each and everyone manually. I want to know how that would work for majority of those people and not you personally.
[ Parent | on HN ]
Re:Twitter says an attacker used its API to match usernames ... by u801e on Thursday February 06, 2020 @08:55AM (#22255928)
> I don't think people are interested in adding each and everyone manually.

If they are interested, then they'll find a way.

[ Parent | on HN ]