However, according to global reports, most Facebook users had not received the notifications even on Monday night.
After the exchange, Senator Kennedy went on to say Facebook's "user agreement sucks" and that him and Zuckerberg were "not connecting".
But senators showed no sign of doing anything as useful as that, so Zuck's net worth has soared.
Facebook had not taken a broad enough view of its responsibility for people's public information, said Zuckerberg. "I run it, and I'm responsible for what happens here".
Zuckerberg paused for a full eight seconds, chuckled, grimaced before ultimately responding with "no".
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Although Facebook's proactive move to show users whether or not their data was stolen is useful, it seems like just the tip of the iceberg.
He said the Russian campaign of disinformation had been discovered "right around the time" of the United States presidential election, and said the company had developed "new AI tools" to identify fake accounts responsible. And I think it's one of the reasons why we struggle with it.
Cambridge Analytica, a political data firm, used information that had been harvested from as many as 87 million Facebook users several years ago to build psychological profiles of voters using exactly that.
The social networking giant has said that under the data abuse bounty programme, it would reward people with first-hand knowledge and proof of cases where a Facebook platform app mines and transfers peoples' data to another party to be sold, stolen or used for scams or political influence.
Ever since the Facebook data breach reports came in, we are no longer sure about how safe and secure our personal information is with Facebook.
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Under "Data safety", the notes read, "Made mistakes, working hard to fix them".
Meanwhile, Facebook has started notifying all the users who were affected by the Cambridge Analytica data privacy scandal that was initiated by Cambridge University Professor named Aleksandr Kogan.
"There are people in Russian Federation whose job it is to try to exploit our systems and other internet systems".
Others sued in the action, in U.S. District Court in DE, included Cambridge Analytica, SCL Group Ltd. and Global Science Research Ltd., which "obtained the Facebook user data to develop and foster political propaganda campaigns", according to the lawsuit. Over the weekend, Facebook kicked two more companies, CubeYou and AggregateIQ, off the platform for misusing data.
It's unclear whether the cushion was specially requested by Mark Zuckerberg or whether it was brought in from his own office but as word got out on his "big boy" chair, there was no dearth of jokes on Twitter about the extra padding.
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