Developers at major technology companies, outraged by the Snowden disclosures, started pushing back. Some, such as those at WhatsApp, which was bought by Facebook a year after the story broke, implemented their own encryption. Others, such as Yahoo’s Alex Stamos, quit rather than support further eavesdropping. (Stamos is now the head of security at Facebook.)

Five years after historic NSA leaks, whistleblower tells the Guardian he has no regrets.

Mon 4 Jun 2018 13.00 EDT Last modified on Tue 5 Jun 2018 04.46 EDT.