StarkWare executes first quantum-safe Bitcoin transaction on mainnet
Bitcoin (BTC)
Editor:
Eugene Serbin
cryptobriefing.com reports that StarkWare has successfully mined the first quantum-safe Bitcoin on the mainnet. The company demonstrated a working transaction using its Quantum-Safe Bitcoin method, which was developed by Chief Product Officer Avihu Levy. On Wednesday, StarkWare sent 3.1 BTC using this new protocol to verify its functionality.
This transaction proves that the spend cannot be forged by a quantum computer under Bitcoin's current rules. The move marks the transition of QSB from a whitepaper concept to a working implementation. StarkWare aims to prepare Bitcoin custodians for the potential emergence of powerful quantum computers.
The primary risk identified is not theft but paralysis, where vulnerable coins could become stranded and unable to be spent. QSB provides a quantum-safe spending path that can be provisioned under existing rules without requiring a soft fork. This solution allows custodians to act before a network upgrade is necessary to secure their assets.
How the market reacted
Whalio's own Binance spot order flow for BTC, measured when this story was written up on 27 August 2026. Not the outlet's figures.
BTC is trading at $79,023.75 with a 24-hour buy ratio of 49.9%, indicating a near-even split between buyers and sellers. Short-term pressure shows a decline, with the 1-hour buy ratio at 44.7% and the 4-hour ratio at 43.0%. Volume deltas are negative across all timeframes, with -$9.6 million in the last hour and -$13.5 million over four hours. This negative delta means sellers are executing larger trades than buyers, exerting downward pressure on the price. The cumulative volume delta for the day is -$64.5 million, suggesting that selling has outweighed buying for most of the session. Net buying occurred for only 10 of the 24 hours, confirming a day where sellers held the upper hand.
The latest daily buy ratio of 46.7% sits at the 18th percentile of the last 322 days, against a median of 49.2% - weaker buying than most days.
Twenty-four hours later
What BTC did over the 24 hours after the story broke. The market moves for its own reasons; this is what happened, not what the story caused.
Was that an ordinary day?
The same Binance spot measurements for BTC, averaged over the days leading up to the story.
Over the preceding week, the buy ratio averaged 51.6%, meaning today's 49.9% ratio is slightly below the weekly norm. Volume has also cooled, trading at 0.54 times the average daily volume. Despite the lower volume and slightly weaker buy ratio, the coin has gained 14.0% over the last eight days. This positive price action contrasts with today's net selling pressure, as the weekly volume delta remains strongly positive at over $445 million. While today is an ordinary day for volume and buying balance, it follows a week of significant accumulation and price appreciation.