31.03.2026 13:11
## Google's Quantum Computing Advancement Raises Concerns About Bitcoin's Security
Recent findings from Google's quantum computing division have ignited a fresh wave of discussion regarding the long-term security of Bitcoin. A newly published research paper by the Quantum AI team suggests that the computational power required to successfully compromise Bitcoin's cryptographic defenses might be significantly less than previously anticipated. This development introduces a more immediate and potentially concerning timeline for the cryptocurrency's vulnerability to quantum attacks.
The study indicates that cracking the elliptic curve cryptography underpinning Bitcoin could necessitate fewer than 500,000 physical qubits. This figure represents a substantial decrease – approximately 80% – compared to earlier estimations that placed the requirement in the millions of qubits. Furthermore, the research posits that a sufficiently powerful quantum computer could potentially intercept a live Bitcoin transaction within roughly nine minutes. This timeframe is notably faster than the network's average transaction confirmation time of around 10 minutes and has a success rate of approximately 41%.
Interestingly, Google itself has proactively addressed the evolving quantum threat. The company has announced its commitment to migrating its own authentication infrastructure to post-quantum cryptography by the year 2029. This decisive action underscores the recognition within the hardware development community of the potential risks posed by quantum computing and the necessity for preemptive measures.
A significant portion of Bitcoin's circulating supply – around 6.9 million BTC, valued at approximately $456 billion – is currently held in wallets where the public keys are publicly accessible on the blockchain. This exposure is partly attributable to Bitcoin's Taproot upgrade, a protocol enhancement designed to bolster privacy but which inadvertently resulted in the default exposure of public keys.
The research details that while the qubit requirements have been lowered dramatically, approximately 1,200 to 1,450 high-quality logical qubits could suffice to mount a successful attack. This rapid advancement in quantum computing capabilities necessitates a thorough re-evaluation of Bitcoin's security posture and the potential need for further proactive defenses. The implications of these findings are far-reaching, prompting ongoing discussions about the future resilience of this leading cryptocurrency in the face of rapidly evolving technological advancements.
**Source: Internet Resources**
