Facebook faces its worst-ever crisis after information leak is exposed

With Facebook mired in its worst-ever crisis, the rest of Silicon Valley is looking to come to terms with the dark side of its data-driven business model where tech titans have mined fortunes from what people reveal online.
There are signs the crisis could spread to other internet firms that have made no secret about using what they glean from digital data for targeted advertising.
That same personal data can be used effectively by those with malicious intent when it comes to influencing people.
"It is Facebook this week, but it could be others," tech industry analyst Rob Enderle said of the crisis of confidence laying siege to the social network.
"At the very least, this is the common problem across the tech industry."
The tumultuous week ended with Facebook losing 14 percent of its market value, wiping out more than $50 billion from one of the biggest and most powerful companies.
A public apology by Facebook chief executive Mark Zuckerberg failed to quell outrage over the hijacking of personal data from millions of people by Cambridge Analytica.
Belatedly speaking out about the harvesting of Facebook user data by the British firm linked to President Donald Trump's 2016...

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