Which of the following is the standard for digital certificates?

Which of the following is the standard for digital certificates?
A . RFC 2298
B. X.509
C. CRL
D. CA

Answer: B

Explanation:

X.509

https://en.wikipedia.org/wiki/X.509

X.509 is a standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secure protocol for browsing the web. They are also used in offline applications, like electronic signatures. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key.

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