News bites: Activist investor calls for spin off of Sony's entertainment arm

The FBI gave temporary security clearances to U.S. banking executives last month so it could brief them on the details of its probe into the cyberattacks against banking websites, Reuters says.

The Attorney General of New York has asked for smartphone handset and software makers such as Apple, Google and Microsoft to help come up with solutions to combating the rising theft of cellphones, The Wall Street Journal reports.

A U.S. judge has ordered the release of previously sealed documents related to the hacking case against Internet activist and programmer Aaron Swartz, according to Reuters.

The European Union's trade chief is seeking to launch investigations into unfair trade practices by Chinese telecom equipment makers Huawei and ZTE, The Wall Street Journal reports.