@Override
    public Set<String> getAllowedSigningAlgorithms(final OAuthRegisteredService registeredService) {
        return this.discoverySettings.getUserInfoSigningAlgValuesSupported();
    }
Default encoding for user-info encrypted responses.
support/cas-server-support-oidc-core-api/src/main/java/org/apereo/cas/oidc/profile/OidcUserProfileSigningAndEncryptionService.java