A certificate signing request (CSR) is a message sent from an applicant to a certificate authority (CA) in order to apply for a digital identity certificate. The CSR contains information about the applicant’s identity, such as domain name, organization, location, etc., as well as the applicant’s public key. The CSR is digitally signed by the applicant using their private key, which proves that they own the corresponding public key. The CA will verify the CSR and issue a certificate if the applicant meets the requirements. The certificate will contain the applicant’s public key and identity information, as well as the CA’s digital signature, which validates the certificate. References: LPIC-2 Exam 202 Objectives, What is a Certificate Signing Request (CSR)? Do I need one?
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