Quantum Computing’s Impact on Cryptocurrency: Friend or Foe?

9 min readOct 13, 2023


As technology keeps evolving, there’s an important clash happening between quantum computing and cryptocurrencies. Quantum computing has incredible computational power and it’s getting closer to the world of cryptocurrencies. This upcoming convergence is all about the relationship between cryptocurrency security and the potential impact of quantum computing.

Cryptocurrencies are known for their ability to facilitate secure transactions directly between users, without the need for intermediaries. This is made possible through complex encryption techniques. But quantum computing’s incredible computational power could threaten encryption, which could have a big impact on cryptocurrencies and extend their influence to different areas. Come and be a part of the exciting journey where quantum computing and cryptocurrencies intersect, igniting innovation through their unique differences.

Quantum Computing Basics: Understanding the Bits

Quantum computing combines computer science, physics, and maths to leverage the special features of quantum mechanics and outperform classical computers on complex problems. This field combines hardware innovation and practical applications. Quantum computers use quantum phenomena like superposition and interference to solve problems faster. These enhancements are useful in areas such as machine learning, optimization, and simulating physical systems. You can use quantum computers for a wide range of applications, like optimising financial portfolios or simulating complex chemical reactions. They can do things that even the most powerful supercomputers today can’t.

Source: GMO Research

Quantum computing relies on three fundamental principles:

Superposition: Quantum bits, or qubits — the basic unit of information, similar to a bit in classical computing are different from classical bits because they can be in multiple states at the same time. This unique property enables quantum computers to handle large amounts of data simultaneously.

Entanglement: When qubits are entangled, they instantly share information, no matter how far apart they are. Quantum computers can solve complex problems more efficiently because of this phenomenon.

Decoherence: Quantum states are really sensitive and can be easily messed up by things like radiation. To build quantum computers, one needs to create protective structures that help keep the qubits’ quantum states stable for a longer period of time.

Cryptocurrencies vs Quantum Computing

The conflict between cryptocurrency and quantum computing is a big technological showdown. There’s a concern that quantum computing could shake things up while blockchain technology is gaining traction. Cryptocurrencies use blockchain technology to securely process financial transactions without banks or governments. They encrypt data and break it down into pieces for added security. However, quantum computing has the ability to break this encryption. Quantum computers have the potential to revolutionise various fields, including cryptography, pharmaceuticals, and product design, thanks to their powerful computational abilities.

Source: Cointelegraph

The connection between quantum computers and cryptocurrencies is fascinating and intricate. Public-key cryptography is a crucial part of secure transactions. It involves using two different keys: a private key and a public key. The security of it relies on a ‘one-way function.’ This means that the public key can be obtained from the private key, but not the other way around. The relationship between cryptography and quantum computing is a big concern as quantum computing progresses as it shifts the game by altering how we process calculations for brute force attacks and key guessing as it takes advantage of quantum mechanics using qubits.

Quantum Computing and Cryptocurrency: Conflict Looms

Cryptocurrency is at risk from quantum computing, which could threaten the security of digital assets. Cryptocurrencies could be vulnerable to quantum attacks because of the immense computational power of quantum algorithms. The security mismatch is a big problem, highlighting the need for robust quantum-resistant cryptographic solutions to protect digital assets in today’s changing landscape.

The encounter between cryptocurrency and quantum computing also involves their fundamental principles. Cryptocurrencies rely on decentralised and trustless systems, but the scarcity, high costs, and centralising nature of quantum computers pose a challenge to these principles. To solve these conflicts, researchers and developers should keep working on quantum-resistant cryptographic techniques. This will make digital assets more secure and ensure that cryptocurrencies remain relevant and reliable in the future.

Source: Wccftech

Conflicts Between Cryptocurrency and Quantum Computing

Security Paradox: Blockchain uses cryptographic methods such as SHA-256 and Elliptic Curve Digital Signature Algorithm (ECDSA) to ensure security. Quantum computing’s power could potentially undermine the security of these technologies, raising concerns about their overall security.

Decentralisation vs. Centralisation: Blockchain encourages decentralisation, spreading power and decision-making among participants. However, quantum computers are scarce, expensive, and require specialised surroundings, which naturally leads to centralisation. Quantum computing for blockchain would collide with its decentralised nature.

Public Visibility vs. Quantum Privacy: Blockchains are transparent, so you are able to observe all transactions. Quantum computing brings in ultra-private systems like QKD, which creates a conflict between the openness of blockchain and the perfect secrecy of quantum.

Understanding Quantum Computing’s Potential Threats

Quantum computers could disrupt important cryptographic protocols, including the ones used in blockchain technology. Quantum machines use qubits that can have values of both 0 and 1 at the same time, thanks to superposition. Quantum entanglement helps these computers do tasks faster. But right now, quantum computers are a bit tricky and prone to errors because of interference from the environment. It might still take years for cryptographic protocols to experience a widespread impact from quantum computing

Yet, new research indicates that this timeline might be shorter. In June 2023, IBM and UC Berkeley collaborated and found that even noisy quantum computers can do more than classical computers. The fast progress could put cryptocurrencies and blockchain security at risk, so developers are looking into quantum-resistant cryptography. Keep an eye on these developments because quantum computers could seriously impact cryptocurrencies and blockchain.

Source: Cointelegraph

Quantum computing has caused uncertainty in the world of cryptocurrency and blockchain. Blockchain enthusiasts are worried about the potential threat of highly advanced quantum machines breaking current encryption methods causing concerns about compromised security.

Cryptocurrency Mining at Risk:

Most of the early blockchain protocols use proof of work consensus mechanisms to agree on the state of the ledger at any moment in time, these are especially vulnerable to quantum computing.

Unlocking Private Keys: A Quantum Menace:

Quantum computing’s ability to crack encryption could enable malicious actors to steal cryptocurrency by deducing private keys from public addresses, making this threat more realistic than quantum-driven mining attacks.

Risks and Implications:

The global cryptocurrency market has exceeded $1.15 trillion, making it a significant part of investment portfolios. Quantum computers pose potential risks to this asset class, prompting asset managers and publicly traded companies to consider public disclosure on their impact.

Quantum Era Preparation for Cryptocurrency

Both PoW and PoS blockchains are vulnerable if the encryption they rely on is compromised. ASIC mining chips help protect PoW networks, but quantum computing can threaten blockchain authenticity and key ownership. Hardware wallets are currently the best for key security, but upgrading them can be challenging.

Source: Q-munity

Post-Quantum Defence:

As quantum computing progresses, only a handful of cryptographic techniques require replacement. Post-quantum encryption research focuses on digital signatures and key agreements. Directed acyclic graphs (DAG), block lattice cryptography, and quantum key distribution (QKD) are technologies that can resist quantum-powered attacks.

NIST Standards:

The National Institute of Standards and Technology (NIST) plays a pivotal role in the standardisation of post-quantum public key encryption. Their commitment to testing and standardisation demonstrates the proactive approach to quantum security.

Blockchain Evolution:

The blockchain industry is evolving to address quantum security concerns. Projects like Iota and platforms like QAN embrace quantum-resistant DAG technology. Block lattice cryptography’s foundation in complex mathematical problems makes it challenging for quantum computers to crack. Such innovations pave the way for quantum-resistant smart contracts, decentralised applications, and digital assets.

In essence, while quantum computing’s threat to blockchain technology is on the horizon, proactive measures, innovative technologies, and evolving standards ensure that blockchain systems will adapt and secure their place in the quantum era.

Crypto’s Quantum Leap: Innovation Ahead

Some people worry that quantum computing could harm blockchains and cryptocurrencies, while others think it could actually make them much safer. The idea is that in the future, blockchains could be super secure, protecting against both regular hacking and quantum computer attacks.

This extra-strong security comes from using quantum keys instead of the usual codes. Quantum key cryptography, which uses tiny particles of light called photons, sends them across special links. If someone tries to sneak a peek at these particles, it’s like an instant alarm goes off, making sure everything stays secure. By bringing together quantum encryption and blockchain technology, we might create these ultra-safe blockchains that can stand up to quantum threats.

Source: BeInCrypto

Quantum Resistant Ledger

The Quantum Resistant Ledger (QRL) is a post-quantum secure blockchain with a stateful signature scheme and unparalleled security. It uses IETF-specified XMSS, an extended Merkle signature scheme with minimal security assumptions. XMSS uses Merkle trees, where each node is labelled with the cryptographic hash of a data block. The QRL claims its extended Merkle signature scheme is more efficient and secure than traditional Merkle signature schemes, but this is challenging to prove without a quantum computer.

Bitcoin Post Quantum

Bitcoin Post Quantum (BPQ) is an experimental branch of Bitcoin’s primary blockchain that uses quantum-safe digital signatures instead of traditional encryption techniques. Unlike QRL, BPQ is in a research stage and its planned currency, BPQ, is not currently being mined. The research may lead to the introduction of quantum-resistant cryptography to the main Bitcoin network in the future.


We’re at a crossroads of innovation and challenge with the fast-paced advancements in quantum computing and cryptocurrencies. Quantum computers have the potential to greatly impact digital security. These super machines, based on quantum mechanics, could soon disrupt the cryptographic foundations of our digital assets. The conflict is dynamic, with security concerns, decentralisation versus centralisation, and the balance between public visibility and quantum privacy being important factors. However, amidst these challenges, there is hope for quantum-resistant solutions and highly secure blockchains. Technologies such as the Quantum Resistant Ledger and Bitcoin Post Quantum are paving the way for this promising future.

As the crypto world prepares for the quantum era, we’re reminded that challenges often lead to new innovations. The industry is committed to adapting and ensuring that blockchain systems not only withstand quantum threats but also thrive. This is evident through the evolving standards, proactive defences, and innovative technologies showcased here. The blockchain industry is showing resilience and adaptability in the face of the quantum era, where innovation and challenges collide. Keep up with the latest in the crypto world by following PAID Network on social media. We share updates regularly, and you can also check out our Medium articles for in-depth information on topics like quantum computing and crypto.

Disclaimer: Mention of any specific projects do not constitute any endorsement or recommendation. Any tokens and strategies are not financial advice. Readers should conduct their own due diligence.

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