New algo. If you know, the qbits have a limited time to do calculations before they turn into basic computer calculations like 0 and 1. If you have an algo that can take much time to solve, the qbits might become 0 or 1 before finding the final result. But it's just a theory. For now.

Basically, quantum computers are a rising technology that might take down most of the cryptographic technologies we actually know, dramatically weakening any kind of traditional protection based on encryption. Sooner or later, it'll become urgent to find a way to deal with this problem, and we're working on it.