Yes that is correct. SHA256 is not known to be vulnerable to quantum computers[^], ECDSA (Bitcoin's public/private key algorithm) is. [^] There is a known quan

Yes that is correct. SHA256 is not known to be vulnerable to quantum computers[^], ECDSA (Bitcoin's public/private key algorithm) is. [^] There is a known quantum attack against SHA256 that reduces the brute force search space from 2^256 to 2^128, but that wouldn't really break the Bitcoin protocol. The ECDSA quantum vulnerability, however, would make ECDSA essentially useless.