Secure optical communication using a quantum alarm

Secure Long-Distance Quantum Communication over Optical Fiber Quantum Channels

In today's communication networks, the widespread use of optical fiber and passive optical elements allows to use quantum key distribution (QKD) in the current standard optical network infrastructure. In the past few years, quantum key distribution schemes have attracted much study. The security of modern cryptographic methods, like asymmetric cryptography, relies heavily on the problem of fact...

Deterministic Secure Communication Using Quantum Nonlocality

Quantum key distribution (QKD) is a protocol which is provably secure, by which private bit can be created between two parties over a public channel. Based on the postulate of quantum measurement [1] and no-cloning theorem [2], different QKD protocol are presented [3]. However, these type of cryptographic schemes are usually nondeterministic. A Beige et al. have presented a quantum communicatio...

A Secure Quantum Communication Protocol Using Insecure Public Channels

Deterministic secure quantum communication using a single d-level system

Deterministic secure quantum communication (DSQC) can transmit secret messages between two parties without first generating a shared secret key. Compared with quantum key distribution (QKD), DSQC avoids the waste of qubits arising from basis reconciliation and thus reaches higher efficiency. In this paper, based on data block transmission and order rearrangement technologies, we propose a DSQC ...

Quantum Secure Direct Communication with Quantum Memory.

Quantum communication provides an absolute security advantage, and it has been widely developed over the past 30 years. As an important branch of quantum communication, quantum secure direct communication (QSDC) promotes high security and instantaneousness in communication through directly transmitting messages over a quantum channel. The full implementation of a quantum protocol always require...