Jon Callas’ move comes after a year of unprecedented activism by engineers at Google and Facebook.
McAfee showed off an Android phone called the McAfee Privacy Phone, which he said was the "most hack-proof phone" ever created.
The encrypted communications firm Silent Circle said Thursday it was tightening access to its mobile apps and secure smartphone to make them harder for terrorists and criminals to use.
Announced earlier this year at MWC 2015, Silent Circle's second iteration of its privacy-focussed smartphone, the Blackphone 2, is now ready for pre-order.
At the ongoing Mobile World Congress in Barcelona, Spain, Silent Circle, the company behind the encrypted and secure Blackphone has shown off the second version of their device.
The Boeing Black phone being developed by the Chicago-based aerospace and defense contractor, which is best known for jetliners and fighter planes, can self-destruct if it is tampered with.