Key Points
- Recent Google research indicates quantum computing power could compromise a Bitcoin transaction within approximately 9 minutes
- The analysis shows roughly 500,000 qubits suffice to break Bitcoin’s encryption — a figure 20 times lower than prior projections
- Approximately 6.9 million Bitcoin face vulnerability, with 1.7 million belonging to wallets from Bitcoin’s earliest days
- Financial analysts at Bernstein characterize the threat as significant yet addressable, estimating a 3–5 year timeline for implementation
- The proposed BIP-360 soft-fork offers a potential pathway to minimize quantum risks for Bitcoin storage systems
A recently released whitepaper from Google signals that quantum computing technology could compromise Bitcoin transaction security in approximately nine minutes. The document, published March 30 by Google’s Quantum AI division, details the accelerating timeline for this emerging threat.
The study reveals that under 500,000 qubits would suffice to compromise the 256-bit elliptic curve cryptography safeguarding Bitcoin addresses and transfers. This figure represents roughly one-twentieth of what previous research had projected.
Bitcoin transfers temporarily reveal a public key during the brief period before blockchain confirmation. A quantum computer with adequate processing power could exploit this public key to derive the corresponding private key and redirect funds within this exposure window.
A typical Bitcoin transaction requires approximately 10 minutes to achieve confirmation. According to Google’s analysis, a quantum-based attack executed during this timeframe would carry a success probability of just below 41%.
The research identifies approximately 6.9 million Bitcoin as currently susceptible to this attack vector. This total encompasses roughly 1.7 million coins originating from Bitcoin’s genesis period, when wallet architecture exposed public keys automatically.
The Taproot implementation of 2021, designed to enhance Bitcoin’s transaction privacy and operational efficiency, similarly reveals public keys as a standard feature. Google’s analysis suggests this architectural choice may expand the pool of at-risk wallets.
Blockchain networks like Ethereum that process transactions more rapidly than Bitcoin face reduced exposure to this particular attack methodology.
Timeline for Network Enhancement
Investment banking firm Bernstein characterized the quantum computing challenge as significant yet solvable within their analysis. The firm noted that recent Bitcoin market volatility already incorporates growing recognition of this technological challenge.
🚨HUGE: QUANTUM RISK TO $BTC “NEITHER EXISTENTIAL, NOR NOVEL”
According to several Bernstein analysts speaking to DLNews, the quantum threat posed to Bitcoin is little more than a required technical upgrade for $BTC.
As DLNews wrote, it is “not a death sentence for Bitcoin”.… pic.twitter.com/E97B27J2AX
— BSCN (@BSCNews) April 9, 2026
Bernstein’s timeline analysis suggests developers have approximately 3–5 years before quantum systems with practical attack capabilities emerge. This period provides the Bitcoin ecosystem an opportunity to coordinate necessary protocol changes.
BIP-360 represents one technical solution under consideration—a soft-fork introducing a novel output structure designed to conceal public keys until funds are actively transferred. Research from Binance highlights that while BIP-360 addresses significant vulnerabilities, it does not eliminate all immediate exposure risks, though it mitigates what the exchange termed a critical long-term threat.
The greater challenge, Bernstein emphasizes, extends beyond developing quantum-resistant algorithms. The primary obstacle involves migrating millions of wallet holders while achieving broad agreement across a distributed, decentralized ecosystem.
Expert Perspectives
Chris Tam, who leads quantum technology firm BTQ Technologies, informed TheStreet that projections regarding quantum computing’s capability to compromise cryptographic systems have consistently shortened over recent years.
Tam emphasized that decentralized blockchain networks lack centralized control mechanisms for rapid updates. Protocol-wide transitions demand extended implementation periods spanning months or potentially years.
BTQ Technologies currently operates testing protocols for Bitcoin Quantum, a modified Bitcoin implementation incorporating quantum-resistant cryptographic methods.
Google disclosed that its organization initiated post-quantum cryptography migration efforts in 2016 and recommends cryptocurrency ecosystems commence their transition processes immediately.
Bitcoin maintained a price level of $68,073.72 when this information was compiled.
