Quantum Breakthrough or Limited Achievement?

Blog Post

Some news in the world of quantum communication. A Chinese research team recently announced a significant milestone, achieving quantum key distribution (QKD) at a distance of 615 KM using an open configuration of twin-field QKD. While this achievement is a testament to the rapid advancements in quantum technology, it’s essential to recognize that QKD has limitations.

Qrypt has developed a groundbreaking alternative to QKD: Quantum Key Generation. Qrypt’s technology offers several key advantages, making it a more practical and robust solution for secure communication. Here are some of those advantages:

No distance limitations

Unlike QKD, which has strict limitations on distance and requires dedicated fiber runs, Qrypt’s Quantum Key Generation overcomes these constraints by enabling multiple parties to independently and securely generate identical symmetric keys and one-time pads at multiple endpoints.

No key transmission

Qrypt’s BLAST protocol eliminates the need for encryption key transmission, completely mitigating the risk of interception or man-in-the-middle attacks.


Qrypt’s technology doesn’t require dedicated fiber, satellites, or other expensive infrastructure, making it a more affordable solution for quantum-secure communication.

High-speed and always-on

Qrypt’s Entropy technology leverages multiple high-rate quantum random number generator (QRNG) appliances in the cloud, providing true random numbers securely accessible from anywhere with an internet connection at speeds many orders of magnitude higher than QKD.

Broad device compatibility

QKD is inherently limited in its ability to connect to a wide range of client devices, such as cell phones, laptops, desktops, IoT devices, and vehicles. In contrast, Qrypt’s Quantum Key Generation is designed to be compatible with various devices and communication channels, making it a more versatile solution for securing our increasingly interconnected world.

In summary, while the recent twin-field QKD achievement is indeed impressive, it is essential to recognize the limitations of QKD as a technology. Qrypt’s Quantum Key Generation offers a more practical, secure, and scalable solution, bringing us closer to realizing a quantum-secure future.

For a detailed look at how it works, see our blog post, Quantum Key Generation Explained.