By: Jean-Philippe Beaudet

February 12, 2025  

The Growing Risk of Quantum Computing 

Quantum computing is rapidly advancing, and while it offers incredible potential, it also creates a major cybersecurity risk. It introduces significant security risks across all sectors, particularly for systems relying on conventional cryptographic methods such as public-key cryptography. The U.S. relies on encryption to secure classified intelligence, nuclear command systems, and financial transactions – but quantum computers, once mature, could break these defenses in mere seconds. Without immediate action, any data storage, communication, or financial transactions that rely on existing encryption methods would be vulnerable. 

Blockchain as a Quantum-Resistant Solution 

Blockchain technology offers a promising defense against emerging quantum threats by leveraging its advanced encryption and decentralized nature. Here’s how it helps: 

1. Data Integrity with AES-Grade Encryption 

  • Blockchain uses encryption similar to the Advanced Encryption Standard (AES) – the same method the U.S. government uses to protect the most sensitive information1. 
  • AES works by scrambling data into an unreadable format using secret keys of 128, 192, or 256 bits, making it difficult to crack. 
  • Think of AES as a high-security vault that doesn’t just lock but scrambles its contents through multiple layers of transformation, making it nearly impossible to decipher without the correct key. The longer the key (128, 192, or 256 bits), the more layers of security are added, ensuring only authorized parties can unlock and access the original data.  
  • Implementing blockchain technology across sectors not only fortifies existing security structures but also decentralizes control, reducing single points of vulnerability that quantum attacks could otherwise exploit. 

2. Quantum Key Distribution (QKD) for Secure Communication 

  • QKD is an advanced encryption method that allows secure key exchanges. 
  • Unlike traditional encryption, QKD can detect if someone tries to intercept the key, ensuring that only the intended parties can access the information. 
  • When integrated with blockchain, QKD enhances security for transactions, identity verification, and sensitive data exchanges. QKD combined with blockchain technology is quantum-proof. 

3. Post-Quantum Cryptography for Future-Proof Security 

  • Researchers have developed lattice-based cryptographic algorithms like CRYSTALS-Dilithium and FALCON, designed to withstand quantum attacks. 
  • These methods are already recommended by the National Institute of Standards and Technology (NIST) to secure digital identities and financial transactions. 
  • These algorithms allow blockchains to maintain signature security against quantum decryption threats, safeguarding digital identities and transaction records with high efficiency. 
  • Implementing these quantum-resistant algorithms within blockchain ensures continued data security, even in a quantum-enabled world. 

4. Quantum Voting-Based Consensus for Secure, Scalable Transactions 

  • Blockchain relies on consensus mechanisms to verify and approve transactions. 
  • A new method, Quantum Delegated Proof of Stake (QDPoS), allows for secure voting-based validation without requiring excessive computing power. 
  • This ensures blockchain networks remain efficient, transparent, and resilient – even as quantum technology evolves. 

Benefits and Policy Considerations 
Quantum-resistant blockchain technology isn’t just a security measure—it’s a strategic investment that aligns with U.S. national security priorities. Here’s what policymakers should do: 

1. Establish Blockchain as a Standard for Quantum-Safe Infrastructure 

  • NIST has already identified blockchain as a viable quantum-resistant technology. 
  • The U.S. government should formally integrate blockchain into all critical infrastructure, defense, and intelligence operations to strengthen its cybersecurity. 

2. Support Research & Development for Blockchain-Based Quantum Security 

  • Department of Defense CIO for Cybersecurity David McKeown discussed the DoD’s intended post-quantum cryptography transition.2 
  • Funding R&D efforts focused on blockchain-based quantum resistance will ensure the U.S. stays ahead in cybersecurity innovation. 

3. Build Public-Private Partnerships for Secure Systems 

  • Collaboration between the government and the blockchain industry will accelerate the development of quantum-proof networks and applications. 
  • Establishing clear and transparent opportunities for industry and government collaboration to develop new blockchain-based quantum-proof networks and applications is essential. 
  • Historically, government support of emerging technologies has led to breakthroughs – blockchain as a quantum-resistant cybersecurity tool is the next frontier. 

Blockchain’s role in a quantum future is indispensable, making government action to harness its potential today crucial to protect critical systems tomorrow. Without blockchain’s decentralized security framework, our nation’s critical data remains at risk. 

Who we are: 

The Digital Chamber (TDC) advocates for national and international standards that leverage blockchain’s inherent strengths to mitigate the risks posed by disruptive military and dual-use technologies. TDC advocates smart, balanced policy, law, and regulation that promotes legal, ethical use of blockchain technologies to protect consumers, human rights, and freedom of speech, while allowing these nascent technologies to flourish in the U.S., grow our economy, and raise our standard of living. 

It is vital for U.S. national security interests to lead in advanced computing and blockchain innovation to ensure networks are safe, information remains secure, and the U.S. can respond effectively to emerging threats. By integrating blockchain, the U.S. can maintain an unbreakable security posture in a post-quantum world. 

If you have any questions, please reach out to Policy@digitalchamber.org.