Apple and Google adopted strong default encryption in late 2014.
The new rules do not mention Islamic State or any other group by name
Apple Inc has said it will issue a software update very soon to cut off the ability of spies and hackers to grab email and other sensitive data from Mac computers.
The move opens a new front in Google's battle with Microsoft by offering an alternative to its Windows XP operating system, which dominates the netbook market with a roughly 80 per cent market share.
A Chinese spying operation has obtained sensitive data from hundreds of government computers in more than 100 countries, according to a new report.