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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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3 answers
1k views

Can a SHA2 x509 cert thumbprint be spoofed/specified?

Looking at a potential solution where the thumbprint of a client cert is used to identify individual users and provide access control. Supposing someone was able to view the thumbprint of a cert insta …
Peter Dongan's user avatar