messages, optionally using TLS (HTTPS) for additional protection. Encapsulated in CoAP messages, optionally using DTLS for additional protection. TCP or any other reliable, connection-oriented transport protocol. As a file, e.g., over FTP or SCP. By E-Mail, using the MIME encoding standard. The Content-Type used is application/pkixcmp; older versions of the draft used application/pkixcmp-poll, application/x-pkixcmp or application/x-pkixcmp-poll. Implementations OpenSSL version 3.0 includes extensive CMP support in C. Bouncy Castle API offers a low-level CMP support in Java and C#. RSA BSAFE Cert-J provides CMP support. cryptlib provides CMP support. EJBCA, a CA software, implements a subset of the CMP functions. Nexus Certificate Manager supports CMP. Entrust Authority Security Manager implements CMP support. Insta Certifier CA implements CMPv2 support. See also Simple Certificate Enrollment Protocol (SCEP) Certificate Management over CMS (CMC) Enrollment over Secure Transport (EST) Automated Certificate Management Environment (ACME) References Public key infrastructure Cryptographic protocols Internet Standards Internet protocols