Members of hacker group Anonymous took credit Thursday for an online raid of the Los Angeles Police Canine Association and the posting of personal and potentially embarrassing information.
A self-defined Saudi hacker claimed he had published details of 400,000 Israeli-owned credit cards online, but the card firms on Tuesday insisted that only 14,000 cards had been affected.
Even after Washington pointed the finger at North Korea for the massive cyberattack on Sony Pictures, some experts say the evidence is far from clear cut.
Internet hackers invaded an official Brazilian website on Friday, the third straight day Brazilian government websites had been attacked, as a similar attack in Peru prompted police to seek US assistance from the FBI.
A Philippine hacker has posted online what he claimed to be the president's personal mobile telephone numbers, with Benigno Aquino's spokesman denouncing the act as "cyber vandalism".
A court in Armenia on Tuesday gave a four-year jail sentence to the alleged Russian mastermind behind a computer virus crime group which infected some 30 million computers worldwide.
Hong Kong police said Sunday they had arrested a 21-year-old man after he reportedly said on social networking site Facebook that he would hack several government websites.
A suspected LulzSec hacker group ally arrested in Britain faces charges that he took part in cyber attacks on companies in the United States, court documents show.
NATO defence ministers agreed Tuesday to set up rapid reaction teams to help defend the military alliance against a growing number of cyber-attacks, many of them blamed on China.
An Islamist group on Tuesday said it will carry out new cyber attacks on US banking targets, according to SITE Intelligence Group, following similar attacks last week in response to an anti-Islam film.