crypto that uses quantum system

Quantum computing has the potential to significantly impact cryptography and cryptocurrency, both positively and negatively. As of my last update in October 2023, there are a few projects and concepts in the cryptocurrency space that explore quantum systems or quantum-resilient technologies:

**Qubit Networks**: Some projects aim to develop quantum communication networks that leverage quantum entanglement for secure data transfer. Though still largely theoretical and research-focused, these efforts explore how quantum principles can enhance security.

**Quantum-Resistant Cryptography**: Many cryptocurrencies are investigating quantum-resistant cryptographic algorithms to protect against the potential future threats posed by quantum computers. Examples of such algorithms include lattice-based, hash-based, multivariate polynomial, and code-based cryptography. While these may not specifically use quantum systems, they are designed to be secure against quantum attacks.

**Project Q**: This is an initiative that actively explores how blockchain technology and quantum computing can intersect. While the details of specific implementations may vary, the goal is usually to enhance security and privacy.

**Secure Quantum Blockchain**: Some theoretical frameworks propose using quantum key distribution (QKD) to create secure communication channels for blockchain transactions. QKD leverages the principles of quantum mechanics to ensure that any eavesdropping can be detected.

**Quantum Networked Cryptography**: This concept works towards integrating quantum networks with classical blockchain technology, providing a paradigm where data integrity and security can be enhanced through quantum communication methods.

While the field is still developing, it’s important to remember that quantum computers capable of breaking current cryptographic protocols are not yet a reality. Research continues to evolve, and industries are preparing for a future where quantum computing may play a significant role in both encryption and decryption processes in cryptography.