Currently, there is a lot of confidential information being communicated through the
Internet, including passwords,
credit card information, and confidential corporate information.
The content of these communications seems to be protected by encryption, but in fact,
the encryption can be deciphered
with the use of high-performance computers.
While conventional computers require much time to decipher the information, with the
development of quantum computers
and such technologies, which can process information more rapidly, there is a fear that
the Internet may suddenly stop
functioning due to a swarm of cyber-attacks such as unauthorized logins and personal
In order to eliminate such dangers, a quantum internet using completely secure in theory
technology is necessary. When quantum communication is eavesdropped, the quantum state
changes according to the physical
laws of quantum mechanics making it possible to detect eavesdropping. However, because
it is necessary to use photons,
which are extremely weak light, it is not possible to use the repeaters (amplifiers)
used on the fiber-optic Internet.
On the other hand, relaying is desirable for secure communication over long distances,
and a “quantum repeater”
dedicated to quantum communication is essential for realizing the quantum Internet.
LQUOM possesses all the elemental
technologies necessary to develop a quantum repeater and is currently developing a
prototype for demonstration by 2023.
A quantum repeater must have the ability to send a quantum to a distant location without
destroying it. Furthermore,
LQUOM is developing a quantum repeater with a routing function (a function to select a
network route) similar to the
conventional Internet. The routing function is the basis of the Internet today, and it
allows multiple devices to
communicate, rather than one-to-one communication. Additionally, this function can be
used to divert to a safe route
when eavesdropping is detected. The basis for this is cutting-edge physics, such as
quantum teleportation and quantum