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.
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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. This produces a valid Bitcoin signature without a private key.
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