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2016 — Yahoo: Happened in 2013 but only disclosed late 2016, 1000.0M records

2016 1.0B records affected

Technical writeup

Happened in 2013 but only disclosed late 2016. Data included names, telephone numbers, DOBs, passwords and security questions.

Root cause

Hacked

References

http://www.nytimes.com/2016/12/14/technology/yahoo-hack.html?action=Click&contentCollection=BreakingNews&contentID=64651831&pgtype=Homepage&_r=0