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Technology
New technology explained in plain language.
20262 articles
How Passkeys Work: Signing In Without a Password
A passkey replaces your password with a pair of cryptographic keys. The private half never leaves your device, so there is no secret to type, steal or reuse.
How GPS Works: Satellites, Clocks and Your Position
GPS finds your position by timing radio signals from satellites about 20,200 km up. Here is how the satellites, atomic clocks and your receiver fit together.