"A new – and theoretical – system for blockchain -based data storage could ensure that hackers will not be able to crack cryptocurrencies once we all enter the quantum era. The idea, proposed by researchers at the Victoria University of Wellington in New Zealand, would secure our crypto futures for decades to coming using a blockchain technology that is like a time machine."
Source and More https://www.geekfence.com/2018/04/24/meet-the-quantum-blockchain-that-works-like-a-time-machine/
