[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

비만아 부모의 돌봄 경험: q 방법론

Cosine-transform-based chaotic system for image encryption

A novel bit-level image encryption algorithm based on chaotic maps

2D Logistic-Sine-coupling map for image encryption

By utilizing Bell states and GHZ states, two quantum deterministic key distribution (QDKD) protocols are presented to hand over the previously deterministic key to the intended receiver. The proposed QDKD protocols have two-way authentications, and then the eavesdropping and impersonation can be detected easily. The deterministic key itself is not transmitted over the channel and the receiver Bob infers his key in an indirect manner with the relationship between Alice’s messages and his own measurement results, which guarantees the security of the deterministic key. Different from the quantum key distribution protocols yielding random keys, the proposed QDKD protocols can distribute the pre-deterministic keys securely, which are of great significance in the filed of key management.

Novel Quantum Deterministic Key Distribution Protocols with Entangled States

Historically, the information efficiency of the secret key in quantum key distribution (QKD) schemes based on binary signal formats was limited to 1 bit/particle. An efficient high-dimensional QKD protocol based on qudits transmission with the quantum Fourier transform is proposed. In the proposal, the inherent encoding framework provides a secure solution to key distribution, where the secret information can be hidden into the relative phases of the generated high-dimensional entangled state by performing the quantum Fourier transform and the quantum controlled-NOT gate. After the reverse operations are carried out, the key information can be decoded with the single-particle measurement chosen from two mutually unbiased bases. The secret key taking the form of the high-dimensional quantum state throughout the proposed QKD protocol enables to break the information efficiency limit. Besides, the security of the proposed QKD protocol is guaranteed by the decoy state method and it is proven to be secure even for the photon number splitting attack and the side-channel attack. The cryptographic performance in terms of security and capacity is better than that of traditional cryptographic protocols.

High-dimensional quantum key distribution based on qudits transmission with quantum Fourier transform

Based on the quantum entanglement channel, two secure quantum deterministic key distribution (QDKD) protocols are proposed. Unlike quantum random key distribution (QRKD) protocols, the proposed QDKD protocols can distribute the deterministic key securely, which is of significant importance in the field of key management. The security of the proposed QDKD protocols is analyzed in detail using information theory. It is shown that the proposed QDKD protocols can safely and effectively hand over the deterministic key to the specific receiver and their physical implementation is feasible with current technology.

http://iopscience.iop.org/article/10.1088/0031-8949/81/04/045009/pdf

Quantum deterministic key distribution protocols based on the authenticated entanglement channel

Two quantum secure direct communication (QSDC) protocols with quantum identification (QI) based on passive optical network (PON) architecture are proposed. One QSDC protocol can be implemented between two different optical network units just with simple configurations of PON by optical line terminal when they are in the same virtual private network after optical line terminal performing QI to the optical network units in the given PON architecture. The other QSDC protocol is also implemented between any two legitimated users in the virtual private network but with considerable reduction of workload of the optical line terminal. The security analysis shows that the proposed QSDC schemes with quantum identification are unconditionally secure and allow the legitimate users to ex- change their secret information efficiently and to realize a quantum virtual private network in the PON networks ultimately.

Novel Quantum Virtual Private Network Scheme for PON via Quantum Secure Direct Communication

Secure and fair multiparty quantum key agreement protocols demand all participants influence and negotiate the shared secret key with equal right and nobody can determine the shared secret key only by himself. To ensure the security and high efficiency, a novel multiparty quantum key agreement protocol based on entanglement swapping between Bell states and G-like states is proposed. This protocol makes full use of Bell states and G-like states as quantum resources and utilizes Bell measurement, Z-basis measurement and unitary operations to generate the shared secret key. It demonstrates that this proposed multiparty quantum key agreement protocol is secure and fair, and simpler with higher efficiency than some other protocols, especially when the number of participants in the protocol is big enough. Furthermore, the proposed protocol can be implemented with existing physical technologies.

Nanrun Zhou

Papers

Novel Quantum Deterministic Key Distribution Protocols with Entangled States

High-dimensional quantum key distribution based on qudits transmission with quantum Fourier transform

Quantum deterministic key distribution protocols based on the authenticated entanglement channel

Novel Quantum Virtual Private Network Scheme for PON via Quantum Secure Direct Communication

Multiparty Quantum Key Agreement Protocol with Entanglement Swapping