https://www.ionos.co.uk/digitalguide/server/security/hpkp-the-security-feature-for-ssltls-certification/
HPKP: The security feature for SSL/TLS certification - IONOS UK
Public key pinning is used to combat false certificates. We explain what the extension of the HTTP protocol actually does.
security featurehpkpssltlscertification
https://www.internetsociety.org/blog/2015/05/new-rfc-7469-on-certificate-pinning-http-public-key-pinning-hpkp/
New RFC 7469 on Certificate Pinning - HTTP Public Key Pinning (HPKP) - Internet Society
Nov 20, 2025 - A couple of weeks ago those of us interested in Internet security formally received a new tool in our toolbox to improve the overall security of the TLS...
certificate pinning