@Override
    public String getSigningKeySetting() {
        return "cas.authn.mfa.trusted.crypto.signing.key";
    }
This is {@link MultifactorAuthenticationTrustCipherExecutor}.

@author Misagh Moayyed
@since 5.0.0
support/cas-server-support-trusted-mfa-core/src/main/java/org/apereo/cas/trusted/authentication/MultifactorAuthenticationTrustCipherExecutor.java