The FBI makes a public appeal to help identify more than 240 victims of a man who used the internet to extort pornographic images from teenage girls.

Radical changes should be made to 999 call services in the UK to allow people to utilise smartphone technology in an emergency, a report says.

Adobe is working to fix a security hole in its Flash Player that was made public after data was stolen from an online surveillance company.

A 17-year old hacker is punished for hijacking thousands of email accounts, disrupting websites, and stealing credit card details, but avoids a jail sentence.

A news site start-up is struggling to make the most of a backlash against the leadership of its larger rival Reddit.

Microsoft cuts 7,800 jobs and takes a $7.6bn writedown as it reorganises its mobile phone unit following last year's purchase of Nokia's business.

A computing fault forces United Airlines to ground its flights for two hours, its second major IT glitch in two months.

The New York Stock Exchange has suspended trading on all shares for technical reasons, but says there is no cyber attack.