Expect-CT header

Expect-CT is an HTTP header that allows sites to opt in to reporting and/or enforcement of Certificate Transparency requirements, which prevents the use of misissued certificates for that site from going unnoticed. When a site enables the Expect-CT header, they are requesting that Chrome check that any certificate for that site appears in public CT logs.

Specification

Editor's draft

Status in Chromium

In development (launch bug)

Consensus & Standardization

  • Public support
  • No public signals
  • No public signals
  • Positive

Owner

Last updated on 2017-04-21