LAS VEGAS--Two researchers have separately uncovered flaws in the way domain names are verified on the Internet that could allow attackers to impersonate a site and steal information from unsuspecting Web surfers.

A Georgian blogger with accounts on Twitter, Facebook, LiveJournal, and Google's Blogger and YouTube was targeted in a denial-of-service attack that led to the sitewide outage at Twitter and problems...

Researchers at security firm Finjan have discovered details of a new type of banking Trojan horse that doesn't just steal your bank log-in credentials but actually steals money from your account while you are logged in and displays a fake balance.