U.S. semiconductor maker Nvidia Corp. says up to 400,000 users of its forums have had their encrypted passwords compromised in attacks dating back to early July.
Some 450,000 Yahoo users' email addresses and passwords have been leaked because of a security breach, the company confirmed Thursday, adding that just a small fraction of the stolen passwords were valid.
More websites admitted security breaches Thursday after LinkedIn said some of its members' passwords were stolen, and experts warned of email scams targeting users of the social network.
(AP) Business social network LinkedIn and online dating service eHarmony said Wednesday that some of their users' passwords were stolen and millions appear to have been leaked onto the Internet.
Bankrupt Canadian telecom company Nortel was penetrated for at least a decade by hackers believed to have been operating from China, the Wall Street Journal reported Tuesday.
Email addresses and passwords belonging to British, US and NATO officials were posted online following the hacking of a US intelligence analysis firm over Christmas, the Guardian daily reported Monday.
Infamous hacker group Anonymous launched Monday its own social network after being rejected by Google's freshly-launched online community.