QKD

Quantum Key Distribution

SDT 1:N QKD

SDT's 1:N QKD is a quantum key distribution device that utilizes the principle of the uncloneability of single photons to establish a secure network between one receiver and up to 64 transmitters.

SDT 1:N QKD is a Plug & Play QKD, consisting of an optical system structure that offers excellent stability even with environmental changes. It is robust against variations in pressure, temperature, and other factors in the optical path.

The 1:N QKD, developed with SDT's unique IP*, is composed of multiple lasers and a pair of avalanche photodetectors (APD) at the receiver, allowing for the distribution of quantum keys to transmitters at a reasonable price.

Maximum communication distance 80km

Up to 1:64 channels available

Decoy-state BB84 protocol

Plug & Play system

Apparatus and method for stabilizing quantum cryptography system

Patent Number US 15/176428

Method for Forming a Quantum Key Distribution Network and Communication Device Thereof

Patent Number 10-2018-0114277

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SDT 1:N QKD Brochure

Why QKD?

The RSA algorithm, a cornerstone of modern security systems based on prime factorization, is increasingly vulnerable as quantum computers advance, enabling rapid prime factorization. In contrast, Quantum Key Distribution (QKD) leverages the principles of quantum mechanics to provide a key distribution mechanism that remains secure not only against current computational methods but also in the era of quantum computing.

QKD securely generates and distributes cryptographic keys using the no-cloning theorem of single photons in quantum mechanics. These keys are one-time-use, valid for a short duration, and automatically replaced after use. If intercepted, the quantum state collapses, invalidating the key and ensuring eavesdropping is fundamentally impossible.

Built on true randomness, QKD relies on the generation and measurement of quantum states. The SDT 1:N QKD employs a random number generator compliant with KS X ISO/IEC 19790:2015 security standards, creating a secure network rooted in genuine randomness.

1:64 Star Topology

The SDT QKD, supporting a 1:64 star topology, delivers a quantum encryption communication network that enables secure communication between administrators at central control headquarters and distributed key facilities.

This technology establishes secure connections between data centers, as well as between classical and quantum computers, paving the way for true quantum-classical hybrid computing.

Furthermore, the 1:N QKD connects a single headquarters to multiple locations, bringing the benefits of public cloud technology to industrial sites previously unable to adopt it. It is also widely applied in major urban communication networks and power grid communications.