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Corporate Research & Development Center

Toshiba's QCCS

1.Introduction (Requirements for unbreakable cryptography)

Introduction image

Unbreakable encryption is possible by using a one-time pad scheme, but up until now it has been difficult to guarantee secure key distribution between two nodes.

Secure encryption key sharing-quantum encryption key distribution

QKD enables secure key transmission.

2.What is quantum cryptographic communication?

What is quantum cryptography?

One-time pad and QKD can be combined to realize secure communications that are theoretically impossible to eavesdrop.

3.Characteristics and performance of Toshiba's quantum key
distribution (QKD) technology

Features and achievements of Toshiba's quantum cryptography key distribution technology

Toshiba were the first to demonstrate a sustained secure key rate exceeding 1 Mb/s over a 50km fibre link.

Outline of demonstration experiment in real environment

Key distribution over 45-km installed fiber for 34 consecutive days
Largest volume of quantum key ever distributed.