Bitcoin March 31, 2026

Google’s Quantum Findings Put Bitcoin Security on a 10-Minute Clock

Google’s latest research is forcing a closer look at quantum computing and Bitcoin (BTC) risks. The firm’s updated estimates suggest that breaking Bitcoin’s cryptography may require far fewer resources than previously thought. While the threat remains theoretical and there is no immediate risk. But the timeline may not be as far off as previously thought.

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Google Estimates Bitcoin Keys Could Be Cracked in 9 Minutes With Fewer Than 500K Qubits

The updated estimates come from Google’s work on quantum computing and cryptography. The researchers suggest that fewer than 500,000 physical qubits could be enough to break elliptic curve cryptography. This is used in Bitcoin signatures. Earlier estimates had placed that number much higher.

The paper also looks at how long such an attack could take. Under certain assumptions, the computation could be completed in about 9 to 12 minutes. This is close to Bitcoin’s average block time of 10 minutes, which is where the concern comes in. In theory, this could allow an attacker to derive a private key after a transaction is broadcast. The whitepaper read,

“This is not merely a distant danger to dormant keys; the potential for early fast-clock CRQCs to launch on-spend attacks within bitcoin’s 10-minute average block time places active transactions at immediate risk.”

There is a Bitcoin quantum threat, even though the required hardware does not exist yet. Current quantum systems are still far below this scale. At the same time, Google has said it plans to move its systems to post-quantum cryptography by 2029. The company has pointed to risks such as “store now, decrypt later.” This is where encrypted data collected today could be broken in the future.

It should be noted that Ethereum developers have also been working on a quantum-resistant upgrade. There is no formal plan outlined for Bitcoin so far.

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What This Could Mean for Bitcoin’s Price

There has been no visible reaction in Bitcoin’s price so far. The risk remains theoretical, and the timeline is uncertain. The updated estimates on both qubits and execution time have shifted expectations slightly. At press time, BTC was trading at a low of $66,441.35 following a daily drop of 1.61%.