This site is fictional demo content. It is not real news or affiliated with any real organization. Do not treat it as fact or professional advice.

NextPaper Logo
nextpaper.ccCYBER CHRONICLE
RSS
EN中文

Full article

FULL TEXT

View this issue
HeadlineINTERNET

Quantum-Encrypted LAN Deployed at Tokyo Stock Exchange: Financial Data Transmission Enters Physics-Level Security

Japanese quantum communications company QStar completes deployment of QuantumLAN at the Tokyo Stock Exchange's core trading system, with 12 quantum-encrypted links covering data channels between the exchange and major brokerages, creating an encryption system based on quantum key distribution that physically eliminates eavesdropping possibilities.

Quantum-Encrypted LAN Deployed at Tokyo Stock Exchange

On August 30, Japanese quantum communications company QStar announced the completion of its QuantumLAN deployment at the Tokyo Stock Exchange (TSE) core trading system. This is the world's first commercial application of quantum key distribution (QKD) technology to a stock exchange's core infrastructure.

QuantumLAN consists of 12 quantum-encrypted fiber optic links connecting TSE's central matching engine with the trading front-end systems of six major brokerages including Nomura Securities, Daiwa Securities, and SMBC Nikko Securities. Each link achieves a key generation rate of 1.2 megabits per second, sufficient for real-time encryption demands in high-frequency trading scenarios.

"Traditional encryption security is built on computational complexity assumptions — assuming that computing power is insufficient to crack keys within a reasonable time," said Kenichi Tanaka, QStar's CTO. "But the development of quantum computers is undermining this assumption. QuantumLAN's security is based on the physical laws of quantum mechanics — any eavesdropping attempt inevitably alters the quantum state, allowing both sender and receiver to detect it."

QuantumLAN's core equipment includes QStar's proprietary QS-800 QKD terminal and QR-200 quantum random number generator. The QS-800 uses an improved BB84 protocol, encoding key information through the polarization states of single photons. When the system detects anomalous quantum state perturbations, it automatically discards the current key and generates a new one.

TSE's technology director stated that QuantumLAN deployment is a core component of the exchange's "2030 Technology Vision" plan. The exchange aims to upgrade all core system data transmission to quantum-encrypted protection by end of 2029.

However, QuantumLAN deployment costs are substantial — the 12 links' hardware and installation expenses totaled approximately 2.8 billion yen ($19 million). QStar stated that with scaled production of quantum communication equipment, deployment costs are expected to decrease by 60% by 2030.