Bitcoin2026-07-08 14:40:17Starkware CPO Unveils Quantum-Safe Bitcoin Transactions with Zero Protocol Changes, Costing $75-$150Avihu Levy, Chief Product Officer at Starkware, published QSB—a quantum-safe Bitcoin transaction scheme built on existing protocol rules. It achieves ~118-bit pre-image resistance against quantum attacks using RIPEMD-160 hashing, with off-chain GPU costs of $75–$150 per transaction. No softfork or consensus change required.1900
Bitcoin2026-07-08 14:38:13Starkware Executive Unveils Quantum-Safe Bitcoin Transaction Scheme Without Protocol ChangesAvihu Levy of Starkware has introduced QSB, a research-backed method for creating quantum-safe Bitcoin transactions using existing Bitcoin rules, though deployment remains limited by relay policy, wallet support, and engineering constraints.1860
Bitcoin2026-07-08 14:34:15Starkware Executive Unveils Quantum-Safe Bitcoin Transactions Without Protocol ChangesStarkware CPO Avihu Levy introduced QSB, a quantum-safe Bitcoin transaction scheme built entirely from existing Bitcoin rules, though the approach still faces relay, cost, and wallet adoption hurdles.1840
Bitcoin2026-07-08 14:34:15Starkware Executive Unveils Quantum-Safe Bitcoin Transactions Without a Protocol UpgradeStarkware CPO Avihu Levy has introduced QSB, a scheme designed to make Bitcoin transactions quantum-safe using existing script rules, without soft forks or new opcodes, though deployment hurdles remain significant.1850
quantum-safe2026-07-02 03:20:14Bitcoin Can Be Quantum-Safe Without Forks: Inside the QSB ProposalA new research proposal by StarkWare researcher Avihu Levy claims that Bitcoin transactions can resist quantum attacks without any protocol changes. The Quantum Safe Bitcoin (QSB) scheme replaces elliptic curve security with hash-based puzzles, specifically a 'hash-to-signature' mechanism that defeats Shor's algorithm. The paper estimates a success probability of 1 in ~70.4 trillion attempts per puzzle. Each transaction costs $75-$150 to generate using cloud GPUs, but the oversized scripts exceed relay policy limits, requiring direct miner submission. This article explains the three-stage transaction process, security assumptions, current limitations, and why this approach could influence future quantum safety debates in Bitcoin.530
quantum safe2026-07-02 03:00:14StarkWare's Proposal: Bitcoin Transactions Can Be Quantum-Safe Without Protocol ChangesStarkWare researcher Avihu Levy has proposed QSB (Quantum Safe Bitcoin), a scheme that uses a 'hash-to-signature' puzzle to shift security from elliptic curves to hash pre-image resistance, enabling quantum-resistant Bitcoin transactions without modifying consensus rules. The scheme hashes a transaction-derived public key with RIPEMD-160 and treats the output as a candidate ECDSA signature, with success probability of roughly 1 in 70.4 trillion attempts. It offers about 118 bits of second pre-image resistance. Transaction generation costs are estimated at $75-$150 using cloud GPUs, but transactions exceed relay policy limits and require direct submission to miners via services like Slipstream. The proposal is not yet fully demonstrated on-chain but presents a fork-free path for Bitcoin's long-term security.540
StarkWare2026-06-30 12:30:00StarkWare Unveils Starknet Quantum Roadmap, CEO Warns Against ComplacencyStarkWare has released its quantum security roadmap for Starknet, with CEO Eli Ben-Sasson criticizing industry complacency and stressing the need for proactive defense against quantum threats.550
Post-Quantum 2026-06-30 13:06:12StarkWare Unveils Starknet Post-Quantum Roadmap: Three Phases to Replace Pedersen Hash with BLAKE2StarkWare released Starknet's post-quantum cryptography migration roadmap on June 30, 2026, outlining three phases. Phase 1 replaces Pedersen hash with BLAKE2 for state commitments, contract addresses, and network configurations, while introducing Falcon-512 as a post-quantum consensus signature. Phase 2 focuses on migration tools for existing smart contracts. Phase 3 addresses dependencies on Ethereum's own post-quantum migration, including bridge system calls and blob data availability. The roadmap highlights Starknet's proactive approach to quantum resilience in the ZK-Rollup ecosystem.2070
