Quantum entropy for resilient security

The DNX–QKG–01 PCI Quantum Key Appliance provides high-assurance key material for organizations strengthening cryptographic infrastructure against current and emerging threats. Its quantum entropy source is designed to support secure provisioning workflows where the quality, traceability, and operational availability of random key material are critical.

The platform can be introduced into enterprise security architectures as a dedicated source for key generation and distribution processes. Deployment guidance helps security teams define integration boundaries, operational controls, and lifecycle procedures while preserving compatibility with established cryptographic services and governance requirements.

The PCI Quantum Key Appliance is a high-throughput hardware entropy source designed for direct integration into servers, workstations and security appliances. Quantum entropy is generated optically by directing light through a beam splitter and measuring the fundamentally probabilistic distribution of the resulting optical signals with two high-speed photodiodes.

The detector outputs are sampled and processed in real time by an RFSoC FPGA, combining high-speed analogue acquisition, digital signal processing and entropy extraction on a single hardware platform. The system delivers quantum-derived random data at a sustained throughput of up to 250 Mbit/s.

Parameters

Hardware

Key Features

Optical quantum entropy generation
Randomness originates from the probabilistic behaviour of light at a beam splitter. The resulting optical signals are independently measured by two high-speed photodiodes.

Differential dual-detector architecture
The two photodiode outputs are evaluated against each other, reducing sensitivity to common-mode fluctuations in optical intensity, temperature and electronic operating conditions.

RFSoC-based signal processing
High-speed analogue converters and programmable FPGA logic are integrated within the RFSoC platform, enabling deterministic acquisition and processing without relying on the host CPU.

250 Mbit/s throughput
The generator delivers a continuous quantum-random bitstream at up to 250 Mbit/s, supporting demanding cryptographic, cybersecurity and scientific workloads.

Direct server integration
The PCI Express architecture provides an internal hardware entropy source for servers, security appliances and high-performance computing systems.

Programmable hardware platform
The FPGA processing chain can support device monitoring, calibration, entropy extraction, health testing and application-specific output interfaces.

Applications

The PCI Quantum Key Generator is designed for:

• Cryptographic key generation

• Hardware security modules

• Data-centre and server entropy

• Secure communications

• Post-quantum cryptographic systems

• Blockchain and digital-asset infrastructure

• Scientific simulation and Monte Carlo workloads

• Artificial intelligence and probabilistic computing