Yahoo has received between 12,000 to 13,000 requests for user data from law enforcement agencies in the U.S. between Dec. 1 and May 31 this year, the company said Monday.

Google has detected large-scale phishing attacks targeting users in Iran, ahead of presidential elections in the country.

Facebook, Twitter and Microsoft have joined Google in asking for greater transparency in surveillance requests, following widespread criticism of the U.S. government's surveillance programs and the role of the Internet companies.

The U.S. government said late Thursday that it is authorized to collect intelligence information of non-U.S. persons located outside the country, in the wake of news reports on the government's surveillance programs.

The U.S. National Security Agency has been allowed by a court order to collect phone records of a large number of customers of Verizon, according to a report in the Guardian on Thursday.

Law enforcement agencies in the U.S., Vietnam and the U.K. have disbanded a ring that allegedly sold online credit card details since 2007.

Microsoft and the U.S. Federal Bureau of Investigation have taken aim at a botnet network based on malware called Citadel that is held responsible for stealing people's online banking information and personal identities.

Drupal.org has reset account passwords after it found unauthorized access to information on its servers.

The U.S. government is in negotiations with SoftBank for greater control over equipment purchases by Sprint Nextel and the selection of one of the Japanese company's nominee to the U.S. carrier's board, according to a news report.

A bill proposed in the U.S. Senate aims to block imports of products containing U.S. technology stolen online, a move that appears primarily directed at China.

Smartphones with custom versions of Android offered by large mobile operators in the U.S. are not getting security updates as regularly as phones from Google, or smartphones from other vendors like Microsoft, according to a complaint by the American Civil Liberties Union to the Federal Trade Commission.

The White House has threatened to veto the controversial Cyber Intelligence Sharing and Protection Act (CISPA) in its present form, citing concerns that the bill does not adequately prevent sharing of irrelevant personal information.

Walmart's video service Vudu has reset its customers' passwords after it found that hard drives were among items stolen from its office.

Australian police have charged an unidentified juvenile, who is suspected to be a member of the hacker group Anonymous, on a number of counts related to unauthorized access to computer data.

Bitcoin exchange Mt. Gox faced a distributed denial-of-service attack late Thursday, at a time the digital currency is seeing an upward swing.