@Override
    public String getJsonWebKeySigningAlgorithm(final OAuthRegisteredService registeredService,
                                                final JsonWebKey jsonWebKey) {
        return StringUtils.defaultIfBlank(registeredService.getIntrospectionSignedResponseAlg(), AlgorithmIdentifiers.RSA_USING_SHA512);
    }
This is {@link OidcTokenIntrospectionSigningAndEncryptionService}.

@author Misagh Moayyed
@since 7.0.0
support/cas-server-support-oidc-core-api/src/main/java/org/apereo/cas/oidc/profile/OidcTokenIntrospectionSigningAndEncryptionService.java