The theft of information linked to 80 million South Korean credit cards, including salaries, monthly card usage, credit rating and card numbers, has sparked widespread public concern, as cardholders rush to bank branches and overload call centers and service websites to see if their information as stolen.

A top HealthCare.gov security officer told Congress that the Obamacare website passed security testing in December.

Security researchers at Proofpoint have uncovered the very first wide-scale hack that involved television sets and at least one refrigerator.

The Cisco 2014 Annual Security Report reveals that threats designed to take advantage of users’ trust in systems, applications and personal networks have reached startling levels.

The University of Nevada, Reno is establishing a Cyber Security Center.

Target said it is investing US$5 million in a multi-year campaign to educate the public on the dangers of scams.

Democratic lawmakers called for a congressional inquiry into the hacking of credit and debit card data of Target customers.

Retailer Neiman Marcus said that thieves stole some of its customers' payment card information and made unauthorized charges over the holiday season.

Ginger Reeder, spokeswoman for Dallas-based Neiman Marcus Group Ltd., said in an email that the retailer had been notified in mid-December by its credit card processor about potentially unauthorized payment activity following customer purchases at stores, said AP. On Jan. 1, a forensics firm confirmed evidence that the upscale retailer was a victim of a criminal cyber-security intrusion and that some customers' credit and debit cards were possibly compromised as a result, said AP.

Reeder wouldn't estimate how many customers may be affected but said the merchant is notifying customers whose cards it now knows were used fraudulently. Neiman Marcus, which operates more than 40 upscale stores and clearance stores, is working with the Secret Service on the breach, said AP.

"We have begun to contain the intrusion and have taken significant steps to further enhance information security," Reeder wrote.

Citing the Target data breach, Senator Leahy of Vermont reintroduced the Personal Data Privacy and Security Act, which would "establish a national standard for data breach notification, and require American businesses that collect and store consumers’ sensitive personal information to safeguard that information from cyber threats."