HTTP Public Key Pinning Extension HPKP for Apache, NGINX and Lighttpd Published: 30-12-2014 | Author: Remy van Elst | Text only version of this article ❗ This post is over nine years old. It may no longer be up to date. Opinions may have changed. Update 2018-06-12 Chrome 68 has deprecated HPKP. Read more about it on my article Public Key Pinning means that a certificate chain must include a whitel