![]() ![]() If you'd like to contribute to the data, please check out and send us a pull request. The compatibility table in this page is generated from structured data. Finally, report-uri="" explains where to report pin validation failures. This key pinning is also valid for all subdomains, which is told by the includeSubDomains declaration. max-age=5184000 tells the client to store this information for two months, which is a reasonable time limit according to the IETF RFC. The second pin declaration pin-sha256="M8HztCzM3elUxkcjR2S5P4hhyBNf6lHkmjAHKhpGPWE=" also pins the backup key. The Mozilla Observatory is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely. In this example, pin-sha256="cUPcTAZWKaASuYWhhneDttWpY3oBAkE3h2+soZS7sWs=" pins the server's public key used in production. Pin-sha256="M8HztCzM3elUxkcjR2S5P4hhyBNf6lHkmjAHKhpGPWE=" Pin-sha256="cUPcTAZWKaASuYWhhneDttWpY3oBAkE3h2+soZS7sWs=" HPKP has the potential to lock out users for a long time if used incorrectly! The use of backup certificates and/or pinning the CA certificate is recommend. report-uri="" Optional If this optional parameter is specified, pin validation failures are reported to the given URL. ![]() includeSubDomains Optional If this optional parameter is specified, this rule applies to all of the site's subdomains as well. ![]() max-age= The time, in seconds, that the browser should remember that this site is only to be accessed using one of the defined keys. Some browsers might allow other hashing algorithms than SHA-256 in the future. It is possible to specify multiple pins for different public keys. Report-uri="" Directives pin-sha256="" The quoted string is the Base64 encoded Subject Public Key Information ( SPKI) fingerprint. A few weeks ago, I made a post about getting a perfect score on Google Lighthouse, a tool for assessing website performance, SEO and best practices. If one or several keys are pinned and none of them are used by the server, the browser will not accept the response as legitimate, and will not display it.įor more information, see the HTTP Public Key Pinning article. The HTTP Public-Key-Pins response header associates a specific cryptographic public key with a certain web server to decrease the risk of MITM attacks with forged certificates. ![]()
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