During a testy early exchange, he declined to give a commitment to change all users' default privacy settings to collect the minimum amount of personal information. Some even raised the possibility of regulating social media networks. He appeared before Senate and House committees on Tuesday and Wednesday. "That's why every day, about 100 billion times a day, people come to one of our services and either post a photo or send a message to someone, because they know that they have that control and that who they say it's going to go to is going to be who sees the content".
Representative Mike Doyle, a Pennsylvania Democrat, said, "The only way we're going to close this trust gap is through legislation that creates and empowers a sufficiently resourced expert oversight agency with rule-making authority to protect the digital privacy and ensure our companies protect their users' data".
Did Cambridge Analytica get your data?
Cambridge Analytica worked for Trump during his presidential campaign.
"For the most part, so far, this has been a victory for Facebook and Mark Zuckerberg and enormous validation that D.C.is ineffectual", said Scott Galloway, who teaches marketing at New York University. In his opening statement for the congressional hearings, he again apologized for the data breach on behalf of his company.
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Zuckerberg said it would take "many months" to complete an audit of other apps that might also have improperly gathered or shared users' data."I do imagine that we will find some apps that were either doing something suspicious or misusing people's data", he said. The app vacuumed up not just the data of the people who took it, but also - thanks to Facebook's loose restrictions - data from their friends, too, including details that they hadn't meant to share publicly. The company is still investigating the Cambridge Analytica incident.
During Wednesday's hearing, Zuckerberg divulged that his own personal data had been sold to a third party.
Some U.S. lawmakers have raised the possibility of regulating Facebook and other social media companies. They argue the companies have become too big and powerful to police themselves. They have also been blamed for not taking enough action to prevent the spread of false news.
Unless you've taken steps to block certain details, Facebook can also collect: location from geotag data, the date, the phone model you have, the exact device ID of your phone, your cellular/Internet service provider, nearby Wi-Fi Beacons/cell towers (which can be used to triangulate locations), and even things like battery level and cell signal strength.
Facebook CEO Mark Zuckerberg answering questions before the House Commerce Committee.
Throughout Zuckerberg's two days of testifying, the odds seemed to increase that lawmakers would introduce new laws or regulations governing online privacy.
Mr. Zuckerberg explained that when thinking about regulations, government officials need to differentiate between internet companies like his and broadband providers, the companies that build and run the "pipes" that carry internet traffic, like AT&T and Comcast.
"My position is not that there should be no regulation, but I also think you have to be careful about what regulation you put in place", he said. Hai Do was the editor.