In short, the quantum blockchain is immutable because the photons that it contains do not exist at the current time but are still extant and readable. This means the entire blockchain is visible but cannot be “touched” and the only entry you would be able to try to tamper with is the most recent one. In fact, the researchers write, “In this spatial entanglement case, if an attacker tries to tamper with any photon, the full blockchain would be invalidated immediately.”
Meet the quantum blockchain that works like a time machine
A new — and theoretical — system for blockchain-based data storage could ensure that hackers will not be able to crack cryptocurrencies once the quantum era starts. The idea, proposed by researchers at the Victoria University of Wellington in New Zealand, would secure cryptocurrency fut…
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