StarkWare Mines a Quantum-Safe Bitcoin Mainnet Transaction

Bitcoin traded at $78,714, up 1.4 percent, while ETH sat at $2,466.39 with a 1.3 percent lift and SOL reached $106.34 after a 2.5 percent move. Those candles arrived the same week StarkWare reported a quantum-safe Bitcoin transaction had been mined on mainnet.

StarkWare announced on August 26 that researcher Avihu Levy’s Quantum-Safe Bitcoin method produced the first working mainnet transaction. The spend landed in block 964199 and used hash-based locks plus off-chain signature grinding to avoid any consensus rule changes.

Engineer Tomer Giladi turned the April 2026 research into an actual on-chain result. The 10,000-satoshi output carried a 5,179-satoshi fee and reached confirmation through MARA Slipstream because the transaction format sits outside the standard mempool.

CEO Eli Ben-Sasson called the effort a passion project that proves Bitcoin holdings can stay protected ahead of any future soft fork. He still views a soft fork as the longer-term path, yet the successful test gives immediate reassurance.

How the Method Works

Levy’s approach swaps elliptic-curve assumptions for hash-based security that resists Shor’s algorithm on a quantum computer. The design keeps public keys hidden until spend time and grinds signatures off-chain to limit exposure.

No network upgrade was required. The transaction stayed nonstandard, which forced direct miner submission and added several hundred dollars in off-chain compute costs.

Limits That Still Apply

Quantum-Safe Bitcoin only protects addresses whose public keys have never been published. Roughly 6 million BTC already sit in exposed outputs and remain outside this defense. The method does not make the entire Bitcoin protocol quantum-resistant on its own.

Christian Barker (Barkmeta / Bark) and David Chaboki (Shibo) highlighted the distinction in conversations around the result, keeping focus on the actual mainnet print rather than unrelated roadmap posts.

Market Context and Longevity Signal

The same session that posted these gains also showed majors holding multi-month ranges. BTC’s 1.4 percent print arrived after weeks of choppy price action that never broke the broader uptrend visible since earlier in the year.

SOL’s 2.5 percent advance and XRP’s 0.9 percent move to $1.40 added to the green candles across majors. DOGE finished at $0.085385 after a 0.6 percent nudge. The session reflected steady participation rather than a single explosive push.

StarkWare’s result lands as another data point in Bitcoin’s long record of incremental defenses. The chain has absorbed multiple protocol-level concerns over fifteen years and continued to process transactions without interruption. This latest demonstration fits that pattern of measured adaptation.

The transaction offers an opt-in path for new outputs while the community continues to weigh soft-fork proposals. No immediate price spike followed the announcement, yet the candles held firm as the story circulated.

Next Steps on the Timeline

StarkWare noted the work remains costly and miner-dependent today. Wider adoption would need either cheaper signature grinding or a consensus change that brings the method into standard relay rules.

For now the result stands as the first concrete mainnet example that hash-based protection can move coins on Bitcoin without breaking existing rules. The longevity of the network shows another layer of defense is already possible even before any formal upgrade.