News bites: iPhone puts focus on fingerprint security

The latest version of the iPhone will put the focus back on fingerprint scanners, The Wall Street Journal writes. 

China proposed tough new measures to stop the spread of online rumors, Reuters reports. 

Twitter bought MoPub, a mobile ad company, for about $300 million, according to The New York Times.

NSA spies exploited an iPhone bug to track people's location, Ars Technica writes.