Too Long; Didn't Read
HTTP Public Key Pinning (HPKP) is a security feature that tells a web client to associate a specific cryptographic public key with a certain web server to decrease the risk of MITM attacks with forged certificates. The feature is available under the Open CC Attribution ShareAlike 3.0 license under the terms of HPKP and is published under the license of Microsoft's OpenCababet.org/en-US/doc/Glossary.html. It is available to download and use in the wild.