Entering through the back door: A State Trooper truck is seen in front of the Fort Meade, Maryland headquarters of the National Security Agency.

After years of speculation that electronics can be accessed by intelligence agencies through a back door, an internal NSA catalog reveals that such methods already exist for numerous end-user devices.

http://www.spiegel.de/international/world/catalog-reveals-nsa-has-back-doors-for-numerous-devices-a-940994.html