I have a general question about quantum security. ECDSA is suppose to be broken by quantum computers. Whilst something like NTRU is suppose to be secure.
My question is: if we sign with ECDSA and encrypt the signature NTRU. Does that make the signature safe? Because I can expose both ECDSA and NTRU public keys but if either of them is compromised it shouldn't compromise.
Is this a correct statement or am I missing something?