A communication device includes a providing unit, a flow control unit, and a cryptography
processing unit. The providing unit provides a cryptographic key generated using quantum …

A communication device according to an embodiment is a communication device that
communicates with another communication device using an encryption key shared through …

For an error rate QBER, threshold values are preset, including a threshold value Q bit for
frame synchronization processing, a threshold value Q phase for phase correction …

According to an embodiment, a communication apparatus includes a memory and one or
more hardware processors configured to function as a reception unit, a sharing control unit …

A data transmission apparatus includes: a key exchange unit that exchanges an encryption
key for encrypting and decrypting the data with an another apparatus; a first control unit that …

(57) ABSTRACT A cryptographic communication system constituted by a first communication
device, and a second communication device that stores a master key serving as an …

A communication system can maintain high security in communication between a
communication apparatus and a terminal. The communication system includes the …

(57) ABSTRACT A communication System capable of avoiding crosstalk with a simple
structure. By assigning the same identification number data to a transmitter and a receiver …

Provided is a cryptographic communication system including a first semiconductor device
and a second semiconductor device. The first semiconductor device includes a common key …

Provided is a cryptographic communication system including a first semiconductor device
and a second semiconductor device. The first semiconductor device includes a common key …