AI & the web
Public-key cryptography
Cryptography using a related pair of keys, one public and one private.
In everyday use
A sender verifies a signature using a publicly available key.
What to keep in mind
Keep the private key private; the public key serves a different purpose.
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Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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