How public-key encryption works
Public-key cryptography uses a related key pair. A public key can be shared; a private key must remain secret. One common use is to encrypt data for a…
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<p>Context and history behind familiar technology.</p>
How QR codes work and how to use them safely
A QR code is a two-dimensional pattern that encodes data with error correction. A camera or scanner reads the modules, reconstructs the payload and presents an action such…
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