San Francisco bans police use of facial recognition tools
Concerns that new tools may be too intrusive behind push to put brakes on ‘Big Brother’ tech
The 94-year-old professor heralding a new type of long-lasting battery
A new battery cell prototype may be the best chance tech has at creating faster, safer and longer-lasting rechargeable battery power
Everyone is after personal data, not just the NSA
Security conference hears of need to build better safeguards into the systems themselves
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