A full second? Facebook has 900,000,000 active users. They would need over 10,00... | Hacker News

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		sp332 on June 8, 2012 \| parent \| context \| favorite \| on: Poul-Henning Kamp: LinkedIn Password Leak? Salt Th... A full second? Facebook has 900,000,000 active users. They would need over 10,000 CPUs running for 24 hours just to log them in.

lurker14 on June 8, 2012 [–]

..amortized over several weeks. People don't log in every day.

sp332 on June 8, 2012 | [–]

If you share a computer, people log in several times a day. And I bet the distribution over time is lumpy. Even assuming that demand is completely flat, that's over 500 CPUs running 24/7 for three weeks just for the hashes to log people in.

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