Referenceentityauthenticitysignature_header_jwsOn this pageentity.authenticity.signature_header_jwsSignatureHeaderJws Objects class SignatureHeaderJws() Represents the header of a JSON Web Signature (JWS). RFC 7515. __init__ def __init__(alg: str, kid: str) -> None Constructs a SignatureHeaderJws object with the specified algorithm and key identifier.