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A piece of data used in public key cryptography (specifically public key infrastructures) that contains identifying information (i.e. email address or web address), a hash of a public key, and a digital signature that authenticates the data in the certificate. For questions specifically about [x509], [certificate-authority], or [public-key-infrastructure], please use those tags.

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list of revoked certificates published by the CA, and OCSP is kind of a web service, but the idea is the same, any client doing cert validation should have a look and check if the certificate happens …
answered Oct 30 '16 by Gabor Lengyel