The name of the signature algorithm used by this signer. This value will be used as the "alg" parameter in JWS produced. This parameter is not used by the DWN but is unfortunately a required header property for a JWS as per: https://datatracker.ietf.org/doc/html/rfc7515#section-4.1.1 Valid signature algorithm values can be found at https://www.iana.org/assignments/jose/jose.xhtml
The ID of the key used by this signer.
This needs to be a fully-qualified ID (ie. prefixed with DID) so that author can be parsed out for processing such as recordId computation.
Example: did:example:alice#key1
This value will be used as the "kid" parameter in JWS produced.
While this property is not a required property per JWS specification, it is required for DWN authentication.
A signer that signs using a private key.