A team of Chinese researchers has cracked a big problem in blockchain security—they’ve built a system that can supposedly fend off hacking attempts from ultra-powerful quantum computers. Since blockchains rely on encryption to keep things like financial transactions or supply chain data safe, the rise of quantum computing (which could smash current encryption) has been a looming threat. This tech could be a game-changer if it holds up.

Editor’s Note: Quantum computers are still in their infancy, but experts warn they’ll eventually be able to break today’s encryption like it’s a child’s puzzle. If blockchains—which underpin everything from Bitcoin to medical records—aren’t future-proofed, it could spell chaos. This breakthrough suggests we might not be defenseless after all, which is a big deal for anyone banking on blockchain’s long-term survival.