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Was It Yahoo's Sheer Size — or Lapsed Security — That Made It a Target for Hackers?

Was it Yahoo's size — or its reputation for not having sophisticated security practices — that made the internet company an ideal target for hackers?
Image: A sign advertising the internet company Yahoo is pictured at sun rise in down town San Francisco
A sign advertising the internet company Yahoo is pictured at sun rise in down town San Francisco, California on Feb. 5, 2016.Mike Blake / Reuters, file

Yahoo's sheer size, popularity, and reputation for not having security practices as sophisticated as its competitors may have made the internet company an ideal target for Russian spies, according to experts.