Mobile users evade surveillance by using fake names, sources say.
The hermit kingdom looks to expand its scope beyond China.
They say they can access the Internet via wireless networks in the capital.
But the schools are no longer a guaranteed route to elite universities, sources say.
A new study examines the nuclear-armed nation's illicit activities that earn valuable hard currency.
Sources say the strict enforcement targets foreigners and the wealthy.
After working under Jang Song Thaek, they are reassigned to insignificant positions.