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expirationTime

string (Timestamp format)

[Optional] The time at which this credential becomes invalid. This credential will be ignored for new client authentication requests after this timestamp; however, it will not be automatically deleted.

A timestamp in RFC3339 UTC "Zulu" format, accurate to nanoseconds. Example: "2014-10-02T15:01:23.045123456Z".

publicKey

object(PublicKeyCredential)

A public key used to verify the signature of JSON Web Tokens (JWTs). When adding a new device credential, either via device creation or modifications, this public key credential may be required to be signed by one of the registry-level certificates. More specifically, if the registry contains at least one certificate, one of them must sign any new device credential. As a result, only X.509 certificates are accepted as device credentials when the registry contains certificates. However, self-signed certificates and public keys will be accepted if the registry does not contain a certificate. New device credentials must be different from every registry-level certificate.