Bitcoin’s First Quantum-Safe Transaction Hits Mainnet
A new blog post by StarkWare details Avihu Levy's Quantum-Safe Bitcoin (QSB) method, which was executed as the first quantum-safe transaction mined on Bitcoin mainnet, moving coins into quantum-resistant storage without any soft fork or change to consensus rules.
starkware.co/blog
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The first quantum-safe Bitcoin transaction has been mined

A quantum-safe transaction was mined on the Bitcoin mainnet today that holds up against an adversary running a working quantum computer.
QSB closes the window for this type of attack by adding a second quantum-resistant lock alongside the existing one, built on hash functions instead of elliptic curves.