Is Bitcoin Quantum-Safe Now? One Transaction Says Partly

StarkWare said Wednesday that a quantum-safe Bitcoin (BTC) transaction has been mined on the live network, a first for the method. On-chain data shows the transaction spent a 10,000-satoshi output, worth about $8 at current prices, and paid a fee of 5,179 satoshis.

Follow us on X to get the latest news as it happens Quantum-safe Bitcoin, mined on mainnet, Today.Designed by @avihu28 – the first ever quantum-safe Bitcoin transaction was built in collaboration with @MARAFoundation_ and our own @giladi_tom85141.Every chain faces the same quantum deadline.

Today we took a huge step to move…— StarkWare 🥷 (@StarkWareLtd) August 26, 2026 How the Quantum-Safe Bitcoin Transaction Works Quantum-Safe Bitcoin (QSB) attaches a hash-based lock beside the elliptic curve signature that normally guards a Bitcoin output.

Shor’s algorithm, the quantum technique that derives private keys from published public keys, cannot break hash functions. StarkWare researcher Avihu Levy published the QSB method in April. It uses signature grinding.