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Casa Chief Security Officer Jameson Lopp says quantum computing poses no immediate threat to Bitcoin

Jameson Lopp, co-founder and chief security officer of Casa, said in an interview with Bitcoin Magazine that Bitcoin currently faces no immediate threat from quantum computing. He pointed out that practical quantum computers capable of breaking the elliptic curve algorithm used to protect Bitcoin are still a long way off.

Lopp said in the interview that we are still orders of magnitude away from a truly usable quantum computer capable of breaking the algorithm used to protect your Bitcoin. He also said that the current number of usable qubits in quantum computers is limited, that related breakthroughs will still take time, and that he hopes for at least about a ten-year preparation window, because changes to the Bitcoin protocol and the migration of funds themselves could take years.

His remarks came amid discussions around Google’s quantum computing estimates and Bitcoin’s elliptic curve cryptography. Lopp has also previously said publicly that quantum computers will not break Bitcoin in the near term, but that preparations at the protocol level need to be made in advance.

Original sources:

  1. Title: JUST IN: Casa's Chief Security Officer Jameson Lopp says Bitcoin faces no immediate threat from quantum computing Publisher: Bitcoin Magazine (@BitcoinMagazine) Published date: 2026-10-26 URL: https://x.com/BitcoinMagazine/status/2114737959010500896 Source type: media original post (including video) Verification: This article actually read the post and video subtitle transcript, verification date 2026-10-27 Supporting content: Supports Lopp’s statement about no immediate threat and the “orders of magnitudes away” wording

  2. Title: Bitcoin Security Expert Jameson Lopp: Cyberattacks on “Exponential” Path Publisher: Bitcoin Magazine (YouTube) Published date: 2026-10-26 URL: https://www.youtube.com/watch?v=otdw_47EimM Source type: interview video Verification: This article actually read the relevant transcript passages, verification date 2026-10-27 Supporting content: Supports Lopp’s statements that a practical quantum computer capable of breaking elliptic curve algorithms is still far away, that the number of qubits is limited, and that there is a preparation window

  3. Title: Jameson Lopp Says Quantum Computers Pose No Immediate Bitcoin Threat Publisher: TokenPost Published date: 2026-10-26 URL: https://www.tokenpost.com/news/technology/41330 Source type: media report Verification: This article actually read the report, verification date 2026-10-27 Supporting content: Supports the paraphrase of Lopp’s remarks, including no immediate threat and the orders-of-magnitude gap

ABAB AI Insight

As Casa’s chief security officer, Jameson Lopp has long focused on Bitcoin self-custody and security issues. This statement continues his public position since late 2025: quantum computers will not be able in the near term to effectively run Shor’s algorithm to break the elliptic curve digital signature algorithm (ECDSA) used by Bitcoin, but protocol upgrades and large-scale fund migration may take 5 to 10 years, so preparations should be made in advance rather than waiting for the threat to become imminent.

A comparable case is the assessment of quantum threats to other public-key cryptography systems. For example, some standards bodies and companies are already advancing post-quantum cryptography migration planning, while explicitly stating that current quantum hardware is still far from a “cryptographically relevant quantum computer” (CRQC). The similarity is that experts generally distinguish between physical qubits and logical qubits, and emphasize that error correction and algorithmic efficiency are key bottlenecks; the difference is that Bitcoin, as a decentralized system, requires broad consensus for protocol changes, making migration slower than in centralized banking or enterprise systems.

This view means that, in the short term, Bitcoin holders should be more concerned about real-world risks such as software vulnerabilities, AI-assisted vulnerability discovery, and physical security, rather than quantum attacks. In the long term, the community needs to reach consensus on issues such as post-quantum signature schemes, potential hard forks, or fund freezing. Indicators to watch include subsequent progress in the scale of logical qubits in quantum hardware, as well as Bitcoin developers’ discussions and testing progress on post-quantum cryptography proposals such as related BIPs.

ABAB News · Laws of cognition

  1. Experts’ judgment of “no immediate threat” usually also emphasizes the time window required by the protocol changes themselves.

  2. There is an order-of-magnitude difference between the number of physical qubits and the number of logical qubits usable for cryptographic breaking.