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Avihu Levy stories

Aug 26, 2026

StarkWare executes first quantum-resistant Bitcoin transaction on mainnet

StarkWare researcher Avihu Levy successfully tested a quantum-resistant transaction on Bitcoin's mainnet, marking the first production deployment of post-quantum cryptography on the network.

Aug 26, 2026·3 sources

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Top claims

▪The Quantum Safe Bitcoin implementation fits entirely within Bitcoin's existing legacy Script limits of 201 non-push opcodes and 10,000 bytes, requiring no consensus rule changes
▪StarkWare successfully executed and mined the first quantum-resistant Bitcoin transaction on the Bitcoin mainnet on August 26, 2026
▪The Quantum Safe Bitcoin scheme replaces elliptic-curve signatures with Lamport-style hash-based signatures relying on RIPEMD-160 for pre-image resistance, achieving approximately 118-bit second pre-image resistance

Topics

Blockchain quantum resistance Bitcoin Bitcoin protocol & upgrades Post-quantum cryptography Cryptography & hashing Bitcoin security & risks