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StarkWare has completed what it described as the first transaction on the Bitcoin mainnet designed to defend against security threats from quantum computing. The quantum-resistant Bitcoin, or QSB, technology uses a hash-based cryptographic system resistant to quantum algorithms instead of conventional elliptic curve cryptography.
A key feature is that it can be implemented immediately within Bitcoin’s current script standards, without changing the consensus algorithm or requiring a soft fork. Still, the transaction cost was said to run about $75 to $150 per transfer, and the transaction was processed through direct submission to miners because of its non-standard structure.
StarkWare said the result opened a practical path for high-net-worth holders to protect assets immediately from quantum threats without waiting for a network-level protocol overhaul.