Justin Drake: Quantum computing could break cryptographic keys in minutes, three cryptographic components at risk, and the systemic threat to all blockchains | Unchained

Key takeaways

• Quantum computing could break cryptographic keys in minutes, posing a major threat to crypto security.
• Current cryptographic systems in crypto are vulnerable to quantum computing advancements.
• Three specific cryptographic components in crypto are at risk: ECDSA, BLS signatures, and KCG.
• Quantum computers could significantly threaten cryptography within the next 10 to 15 years.
• The timeline for a cryptographically relevant quantum computer is estimated to be around 2031.
• Improvements in quantum algorithms are reducing qubit requirements to break Ethereum cryptography.
• Quantum computing requires error correction to form reliable logical qubits from physical qubits.
• A cryptographically relevant quantum computer could compromise the entire crypto industry.
• The emergence of such a quantum computer poses a systemic risk to all blockchains.
• Whoever creates the first quantum computer could potentially steal coins from any blockchain.
• Quantum computing advancements are reducing the number of qubits needed to break cryptographic systems.
• The crypto industry must prepare for the potential impact of quantum computing on security.

Guest intro

Justin Drake is a researcher at the Ethereum Foundation specializing in protocol development, cryptographic protocols, and blockchain scalability. He played a key role in Ethereum’s transition to proof-of-stake consensus through The Merge in 2022, and has been deeply involved in research on Ethereum 2.0 and related protocol upgrades. Drake studied mathematics at Cambridge University and spent several years as a Bitcoin entrepreneur before joining the Ethereum Foundation in 2017.

The threat of quantum computing to cryptography

• Quantum computers could potentially break cryptographic keys in a matter of minutes.

  — Justin Drake

• Quantum computing poses a significant threat to current cryptographic systems used in crypto.

• Quantum computing is a form of computing that leverages microscopic physics… the major threat for crypto is that it breaks the current cryptography that we have.

  — Justin Drake

• Three specific cryptographic components in crypto are vulnerable to quantum computing: ECDSA, BLS signatures, and KCG.

• For affirm specifically there’s three pieces of cryptography that are vulnerable… ecdsa, bls signatures, and kcg.

  — Justin Drake

• Understanding the basics of cryptography is crucial for grasping how quantum computing threatens crypto security.
• The potential for quantum computing to disrupt cryptographic standards is a major concern for the crypto industry.
• Stakeholders in the crypto industry need to be aware of these vulnerabilities to prepare for future risks.

Timeline for quantum computing advancements

• Quantum computers could pose a significant threat to cryptography in the next 10 to 15 years.

• Most people believe that… perhaps at the ten year fifteen years out from now it starts to become more of a significant probability.

  — Justin Drake

• There is a reasonable chance we could have a cryptographically relevant quantum computer by 2031.

• I think there’s a reasonable chance for example that in 2031 it may be a 1% chance 2% chance maybe more that we’ll have a quantum relevant computer.

  — Justin Drake

• The timeline for quantum computing advancements is crucial for understanding future security challenges in crypto.
• Preparing for the potential impact of quantum computing on cryptographic systems is essential for the crypto industry.
• The crypto industry must consider the timeline for quantum computing advancements in its security strategies.
• Understanding the current state of quantum computing is vital for anticipating future risks to cryptography.

Quantum computing’s impact on Ethereum

• The improvement in quantum algorithms is significantly reducing the number of qubits needed to break Ethereum cryptography.

• If you rewind the clock two three years ago the best known algorithm for for breaking ethereum cryptography required about 10,000,000 physical qubits and then about a year ago so last year in 2025 we had a paper bringing that down to 1,000,000 cubits.

  — Justin Drake

• These advancements highlight the urgency for the Ethereum community to address quantum computing threats.
• The reduction in qubit requirements underscores the rapid pace of quantum computing advancements.
• Ethereum’s security is directly impacted by improvements in quantum algorithms.
• The Ethereum community must stay informed about quantum computing developments to protect its cryptographic systems.
• Understanding the significance of qubit counts is essential for assessing the security of Ethereum.
• The crypto industry needs to prioritize research and development to counteract quantum computing threats.

Error correction in quantum computing

• Quantum computing requires error correction to create reliable logical qubits from physical qubits.

• Because of the noise involved you have to do so called error correction so you have to take a collection of physical qubits in order to form one perfect logical one.

  — Justin Drake

• Understanding the relationship between physical qubits and logical qubits is crucial for quantum computing development.
• Error correction is a fundamental aspect of quantum computing with implications for cryptography.
• The development of reliable logical qubits is essential for the advancement of quantum computing.
• The need for error correction highlights the challenges in developing quantum computing technology.
• Quantum computing’s reliance on error correction underscores the complexity of its development.
• The crypto industry must consider the implications of error correction in its security strategies.

Systemic risks posed by quantum computing

• A cryptographically relevant quantum computer could compromise the entire crypto industry.

• If we have a cryptographically available computer it it it’s basically game over it’s systemically bad for the whole industry where the notion of property rights starts to crumble.

  — Justin Drake

• The emergence of a cryptographically relevant quantum computer poses a systemic risk to all blockchains.

• Whoever creates the first quantum computer could steal as many coins as they want from pretty much any chain… if you can take any public key off of the blockchain you could empty its account right and just forge a transaction that transfers all the assets from this account to the account of your choice.

  — Justin Drake

• The potential for quantum computing to undermine blockchain security is a major concern for the industry.
• The crypto industry must prepare for the systemic risks posed by quantum computing advancements.
• Understanding the vulnerabilities of current cryptographic systems is crucial for addressing quantum computing threats.
• The potential for quantum computing to disrupt the entire crypto industry underscores the need for proactive security measures.