HTTP Public Key Pinning (HPKP), sometimes called "certificate pinning," helps prevent a MITM attack in which the certificate authority itself is compromised, by having the server provide a list of "pinned" public key hashes during the first transaction.
A fixación da clave pública HTTP, as veces denominada “fixación de certificado”, axuda previr un ataque MITM no que a autoridade se certificación mesma se ve comprometida ao facer que o servidor proporcione unha lista de hashes de clave pública anllados durante a primeira transacción.