HPKP

Abbreviation · Security & Infosec

Definitions

  1. Short for HTTP Public Key Pinning, a deprecated web security mechanism that let sites tell browsers which public keys were valid for future TLS connections. HPKP was removed from common browser use because operational mistakes could lock site owners out and attackers could abuse pinning decisions.

    In plain English: An old web security feature for pinning trusted certificate keys in browsers.

    Example: "The team avoided HPKP because one bad pin could brick browser trust for the whole domain."

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