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OCSP checking creates a privacy concern for some users, since it requires the client to contact a third party (albeit a party trusted by the client software vendor) to confirm certificate validity. OCSP stapling is a way to verify validity without disclosing browsing behavior to the CA. [2]
Seeing security certificate errors when visiting certain websites? Learn how to remedy this issue in Internet Explorer.
For example, when a certificate is issued to a high traffic website, the servers of CAs are likely to be hit by enormous volumes of OCSP requests querying the validity of the certificate. [ 2 ] Also, OCSP checking potentially impairs users' privacy and slows down browsing, since it requires the client to contact a third party (the CA) to ...
This reversible status can be used to note the temporary invalidity of the certificate (e.g., if the user is unsure if the private key has been lost). If, in this example, the private key was found and nobody had access to it, the status could be reinstated, and the certificate is valid again, thus removing the certificate from future CRLs.
If any check fails on any certificate, the algorithm terminates and path validation fails. (This is an explanatory summary of the scope of the algorithm, not a rigorous reproduction of the detailed steps.) The public key algorithm and parameters are checked; The current date/time is checked against the validity period of the certificate;
When the certificate is presented for an entity to validate, they first verify the hash of the certificate matches the reference hash in the white-list, and if they match (indicating the self-signed certificate is the same as the one that was formerly trusted) then the certificate's validity dates can be trusted.
An Extended Validation (EV) Certificate is a certificate conforming to X.509 that proves the legal entity of the owner and is signed by a certificate authority key that can issue EV certificates. EV certificates can be used in the same manner as any other X.509 certificates, including securing web communications with HTTPS and signing software ...
A log appends new certificates to an ever-growing Merkle hash tree. [1]: §4 To be seen as behaving correctly, a log must: Verify that each submitted certificate or precertificate has a valid signature chain leading back to a trusted root certificate authority certificate. Refuse to publish certificates without this valid signature chain.
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