A small U.S. company with ties to the U.S. defense and intelligence communities has embedded its software in numerous mobile apps, allowing it to track the movements of hundreds of millions of mobile phones world-wide, The Wall Street Journal reported Friday, citing people familiar with the matter and documents it reviewed. From the report: Anomaly Six, a Virginia-based company founded by two U.S. military veterans with a background in intelligence, said in marketing material it is able to draw location data from more than 500 mobile applications, in part through its own software development kit, or SDK, that is embedded directly in some of the apps. An SDK allows the company to obtain the phone’s location if consumers have allowed the app containing the software to access the phone’s GPS coordinates. App publishers often allow third-party companies, for a fee, to insert SDKs into their apps. The SDK maker then sells the consumer data harvested from the app, and the app publisher gets a chunk of revenue. But consumers have no way to know whether SDKs are embedded in apps; most privacy policies don’t disclose that information. Anomaly Six says it embeds its own SDK in some apps, and in other cases gets location data from other partners. Anomaly Six is a federal contractor that provides global-location-data products to branches of the U.S. government and private-sector clients. The company told The Wall Street Journal it restricts the sale of U.S. mobile phone movement data only to nongovernmental, private-sector clients. Numerous agencies of the U.S. government have concluded that mobile data acquired by federal agencies from advertising is lawful. Several law-enforcement agencies are using such data for criminal-law enforcement, the Journal has reported, while numerous U.S. military and intelligence agencies also acquire this kind of data. Read more of this story at Slashdot.