@Override
    public Set<String> getAllowedSigningAlgorithms(final OAuthRegisteredService registeredService) {
        return JsonWebTokenSigner.ALGORITHM_ALL_EXCEPT_NONE;
    }
This is {@link UmaRequestingPartyTokenSigningService}.

@author Misagh Moayyed
@since 6.0.0
support/cas-server-support-oauth-uma-core/src/main/java/org/apereo/cas/uma/ticket/rpt/UmaRequestingPartyTokenSigningService.java