This is the second breach at the company in the last 12 months. TalkTalk acknowledges that some of its data wasn't protected by encryption.
The future direction of cybersecurity investment and legislation is a high priority for politicians in the wake of the Paris terror attacks.
Vodafone is the second British telecommunications company in two weeks to be on the receiving end of a serious hack.
Almost none of the attacks showed a North Korean IP address, although it's not difficult for hackers to hide their origin.
Can Intel's review board help automakers improve future vehicle defense against cyberattacks?
If China is the culprit, as intelligence chief James Clapper asserts, the US faces the thorny issue of how to respond.
The university's president apologizes for a "sophisticated" security breach that it says involved an attack launched from China.
The Defense Department is expected to announce a modification to the nation's strategy that will result in the use of cyberattacks as a defense tactic.
Ninety percent of companies are vulnerable to a crippling hack, experts tell "60 Minutes."
A debilitating onslaught of Internet traffic directed at Github appears to be focused on shutting down anticensorship tools.