France summoned the US ambassador on Wednesday and said it "will not tolerate any acts that threaten its security" after leaked documents indicated Washington spied on President Francois Hollande and his two predecessors.
Hackers and cyber-terrorists present an ever-evolving threat to airlines, with experts constantly testing for new vulnerabilities -- including the fear that drones could be used to throw a plane off course.
Following disclosures of devastating breaches of US government computer networks, officials told lawmakers even more intrusions may be discovered with investigations and deployment of new security tools.
The US State Department -- on the front lines of the sensitive Iran nuclear negotiations -- said Thursday it was confident there had been no security breach, after Swiss and Austrian investigators launched probes into alleged cyber-spying.
The man responsible for reviewing Britain's anti-terrorism laws called for greater judicial oversight over data interception as ministers prepare legislation firming up the powers of security services following leaks by Edward Snowden.