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Digital Certificate

Digital Certificate

A digital certificate is an electronic "passport" that allows a person, computer or organization to exchange information securely over the Internet using the public key infrastructure (PKI).

Component of Digital Certificate

  • Information about Key or Fingerprints: A digital certificate contains information about key like size, the algorithm etc.
  • Subject or Issued To: A digital certificate contains information about the identity of its owner called subject.
  • Issuer or Issued By: A digital certificate also contains the digital signature of an entity that has verified the certificate's contents called issuer. certificate issuer is a certificate authority (CA).
  • Validity Period: This is a time peroid for which certificate is valid.

What certificate does?

 If the signature is valid, and the software examining the certificate trusts the issuer, then it can use that key to communicate securely with the certificate's subject

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

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