Klein, a former AT&T technician turned whistleblower, exposed mass surveillance by the U.S. government in 2006.

Mark Klein, the former AT&T employee who helped expose the fact that the National Security Agency was spying on vast amounts of internet traffic in the U.S. during the mid-2000s, has died, according ...

The Electronic Frontier Foundation (EFF) recently announced the passing of Mark Klein, the AT&T whistleblower who exposed the ...

In 2006, he shared corporate documents showing how the National Security Agency was accessing internet data through a secret room in an AT&T office building.

Mark Klein, a former telecommunications technician for AT&T and a whistleblower, died in Oakland on Saturday at age 79 due to pancreatic cancer. Klein presented evidence from his work alleging that ...

AT&T engineer, and the Deep Throat of the network age, dies at 79 In 2006, a retired AT&T engineer knocked on the door of the ...

The unlikely hero who stood up to the government Mark Klein, the AT&T technician who blew the whistle on one of the most ...

Mark Klein, a whistleblower who exposed a National Security Agency program of mass government spying on American internet traffic in the 2000s, has died. He was 79 years old. His brother ...

TechCrunch · Image Credits:Mark Klein / Wikimedia Commons (opens in a new window) under a CC BY-SA 3.0 (opens in a new window) license. Mark Klein, a former AT&T technician turned whistleblower ...