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To study the graph of Amazon’s stock performance in 2015 is to witness a series of stepwise lurches toward commanding new heights. Over all, the stock market has been flat this year, and technology companies, as a group, haven’t fared much better. Then there’s Amazon, which...

Without electricity, the world pretty much shuts down, and without gas to heat homes, Wisconsin residents would have hard time coping with winter. As CEO of Madison Gas & Electric, Gary Wolter knows his company has to secure its technology to provide those services to its...

REDMOND, Wash. — Microsoft was once the epitome of everything wrong with security in technology. Its products were so infested with vulnerabilities that the company’s co-founder, Bill Gates, once ordered all of Microsoft engineers to stop writing new code for a month and focus on...

VINCE VANNELLI’S flat tire came at a bad time — just as he was on his way to the San Francisco airport for a flight to Los Angeles. He parked his Tesla, jumped in an Uber car and contacted Tesla service. Once in Los Angeles, Mr....

What's keeping today's investment advisors up at night? Cybersecurity issues. That was one of the takeaways at the Charles Schwab IMPACT 2015 confab in Boston this week, where 1,800 advisors in attendance were offered at least a half-dozen education sessions devoted to online crime and...

Firewalls and medical devices are extremely vulnerable, and everyone’s pointing fingers In the fall of 2013, Billy Rios flew from his home in California to Rochester, Minn., for an assignment at the Mayo Clinic, the largest integrated nonprofit medical group practice in the world. Rios is...

Hack underscores amateur goofs routinely made by Internet-of-Things developers. The cautionary tales just keep coming for Internet-connected TVs, thermostats, and other so-called "Internet-of-Things" devices. Today's lesson comes courtesy of a smart TV from Vizio that was subjected to a man-in-the-middle attack because it couldn't be bothered...

SAN FRANCISCO — The worth of hot technology start-ups seemed for years to go in only one direction: straight up. Now there are signs of growing unease over the dizzying valuations of some of the most richly priced private companies....