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The CSR is typically sent to a Registration Authority (RA), which checks the CSR contents and authenticates the applicant. On success the CSR is forwarded to a Certificate Authority (CA), which produces the X.509 public-key certificate, digitally signing it using the CA private key, and sends the new certificate to the applicant.
The Certificate Management Protocol (CMP) is an Internet protocol standardized by the IETF used for obtaining X.509 digital certificates in a public key infrastructure (PKI). CMP is a very feature-rich and flexible protocol, supporting many types of cryptography.
An organization that wants a signed certificate requests one from a CA using a protocol like Certificate Signing Request (CSR), Simple Certificate Enrollment Protocol (SCEP) or Certificate Management Protocol (CMP). The organization first generates a key pair, keeping the private key secret and using it to sign the CSR.
The certificate is also a confirmation or validation by the CA that the public key contained in the certificate belongs to the person, organization, server or other entity noted in the certificate. A CA's obligation in such schemes is to verify an applicant's credentials, so that users and relying parties can trust the information in the issued ...
The ISRG provides free and open-source reference implementations for ACME: certbot is a Python-based implementation of server certificate management software using the ACME protocol, [6] [7] [8] and boulder is a certificate authority implementation, written in Go. [9] Since 2015 a large variety of client options have appeared for all operating ...
Due to the use of the self-signed PKCS#10 format for Certificate Signing Requests (CSR), certificates can be enrolled only for keys that support (some form of) signing. A limitation shared by other enrollment protocols based on PKCS#10 CSRs, e.g., EST and ACME , or even the web-based enrollment workflow of most PKI software where the requester ...
The OCSP responder uses the certificate serial number to look up the revocation status of Alice's certificate. The OCSP responder looks in a CA database that Carol maintains. In this scenario, Carol's CA database is the only trusted location where a compromise to Alice's certificate would be recorded.
.p7r – response to CSR. Contains the newly-signed certificate, and the CA's own cert..p7s - Digital Signature. May contain the original signed file or message. Used in S/MIME for email signing. Defined in RFC 2311..p7m - Message (SignedData, EnvelopedData) e.g. encrypted ("enveloped") file, message or MIME email letter. Defined in RFC 2311.