Russian security firm Kaspersky Lab will quit the Business Software Alliance (BSA) from 1 January 2012 in a disagreement over the BSA's support of the US Stop Online Piracy Act (SOPA) bill. CEO Eugene Kaspersky confirmed the move on Twitter, promising to reveal more details in a blog. "We're leaving BSA because of their support for SOPA. I'll come out with a blog post re this issue." The SOPA bill is designed to extend the ability of US law enforcement and copyright holders to fight the online exchange of copyrighted material. The bill has angered many large technology companies including Google, Facebook ...