Google to untrust WoSign and StartCom certificates
Following similar decisions by Mozilla and Apple, Google plans to reject new digital certificates issued by two certificate authorities because they violated industry rules and best practices.
The ban will go into effect in Chrome version 56, which is currently in the dev release channel, and will apply to all certificates issued by certificate authorities WoSign and StartCom after October 21. Browsers rely on digital certificates to verify the identity of websites and to establish encrypted connections with them.
Certificates issued before October 21 will continue to be trusted as long as they’re published to the public Certificate Transparency logs or have been issued to a limited set of domains owned by known WoSign and StartCom customers.