How It Works

Safeguarding Data

 In transit, at rest, always and forever

Quantum Xchange is a fiber optic network used solely to transmit and receive quantum cryptographic keys between entities that are securely transferring critical data. As such, Quantum Xchange is a first-of-its-kind nationwide quantum network. The technology used to achieve this is Quantum Key Distribution (QKD).

The Trusted Node network system

While QKD systems are currently the only certified quantum-safe key systems available today, the range limitations of standard QKD makes it impractical to use over long distances. The Trusted Node network system from Quantum Xchange alleviates the range issues of standard QKD to provide practical, certifiable key management over a wide-area network that is unbreakable against quantum computing now and in the future.

Quantum XC Trusted Node

Go the distance

The Quantum Xchange Trusted Node is composed of two or more conventional QKD system endpoints located within a common secure housing. As long as a continuous path of Trusted Nodes links two widely separated endpoints, those endpoints can still share quantum-derived key information over this much longer path. Between consecutive nodes, key information is protected by the same quantum mechanisms as in a singular QKD system. While within a node, key information is protected by encryption with locally-generated keys and a secure boundary that prevents tampering.  And since a Trusted Node can include a number of QKD endpoints, the network topologies that can be realized by the Trusted Node are essentially limitless.


Learn more about the technology fueling Quantum Xchange

Download Our Technical White Paper


Learn more about the technology behind QKD

Download White Paper

Quantum Xchange-as-a-Service

Quantum Xchange has the ability to offer quantum key encryption on the first commercial QKD-as-a-Service quantum network in the United States. Separate from an enterprise’s fiber data network, customers retain absolute control and visibility over their encryption keys and mission-critical data using the Quantum XC fiber quantum network. Quantum keys for different clients are multiplexed over a common optical fiber to reduce the total cost of the solution.

Customer data is sent over separate links, with both key and network redundancy built into the solution.

Wondering what Quantum Key Distribution (QKD) is and some of its core benefits?

QXD uses the quantum properties of single photons to exchange bits between two locations.

QKD keys are derived from the exchanged quantum information.

QKD security is proven: security is based on the laws of physics, not on difficult math problems.

Any attempt to intercept the key is detected because of a change in the quantum state. Corrupted keys are rejected.

Keys can be made truly random, unlike conventional PKI keys, and are not susceptible to future computational hacking.