yes, and that is a solved problem for all encryption already, you need that to find any key in encryption. what makes that hard now is the search takes so much

yes, and that is a solved problem for all encryption already, you need that to find any key in encryption. what makes that hard now is the search takes so much time. In a theortical post quantum world that search wont take much time. So the only way I see that post quantum encryption can be secure is if it is impossible to guess a solution and test it for correctness - which for whatever reason... never seems to get addressed.