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Yahoo is only the latest tech company to be caught up in a system of secret surveillance and government gag orders
Other US tech firms said they have never received such a government request
Yahoo's secret program may have been spying on hundreds of millions of users' accounts at the request of the US government
Users will receive an error when trying to access web servers that use weak Diffie-Hellman key exchange with weak keys
The huge data breach serves as a reminder of some basic security tips
'Technology by itself is not evil, but people can use it for bad things,' one award winner said
Some users have already been asked to change passwords, after a data breach that affects hundreds of millions of accounts
Civil rights groups and tech companies have filed briefs to back Microsoft's fight over the use of gag orders accompanying data requests by government
President Obama's proposal for foreign travelers is so bad, say critics, it must have been hatched by Donald Trump
Advocacy group tells Microsoft to 'come clean' over telemetry, and offer 'meaningful opt-outs'