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Google's Certificate Revocation Server Is Down - What Does It Mean?

January 21, 2018

Earlier today, someone reported to the mozilla.dev.security.policy mailing list that they were unable to access any Google websites over HTTPS because Google's OCSP responder was down. David E. Ross says the problem started two days ago, and several Tweets confirm this. Google has since acknowledged the report. As of publication time, the responder is still down for me, though Ross reports it's back up. (Update: a fix is being rolled out.)

What's an OCSP Responder?

OCSP, which stands for Online Certificate Status Protocol, is the system used by SSL/TLS clients (such as web ...

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