Post quantum resilience absolutely is overkill even if they are secret, since they're not the type of secret you'd care about that for imo. But I suspect "we ha

Post quantum resilience absolutely is overkill even if they are secret, since they're not the type of secret you'd care about that for imo. But I suspect "we have a 512bit port space" is intended to make them secrets ie: impossible for an attacker to bruteforce, at which point you run into birthday attacks, so you're talking about the square of the space. Even still 512bit is too high imo, 192bit should be fine.