| Certificate | A PKI (Public Key Certificate) or digital certificate is an electronic document used to prove ownership of a public key. The certificate includes information about the key, the identity of its owner, and the digital signature of an entity that verified the validity of the certificate’s contents. If the signature is valid, and the client can trust the signer, the client can be confident that it can use the public key contained in the certificate to communicate with the server. |
| Certificate Authority (CA) | An entity that issues the digital certificates used to certify the ownership of a public key by the named subject of the certificate. This allows system users to rely upon signatures or assertions made by the private key that corresponds to the certified public key. In this relationship model, the party that relies on the certificate trusts that the subject (owner) of the certificate is authentic because of the relationship of both parties to the CA. |
| Certificate Signing Request (CSR) | A block of encoded text that is given to a Certificate Authority (CA) when applying for an SSL certificate. |
| Distinguished Name (DN) | A string that uniquely identifies a certificate. |
| MQ Telemetry Transport (MQTT) | A protocol for exchanging queued messages between disparate systems. |
| Onboarding | Process of registering a requester with a service. |
| Requester/Requesting Component | A component that submits the Certificate Signing Request (CSR) to the service. |
| X509 | A standard format of public key certificates. |