General quantum key distribution in higher dimension
Zhao-Xi Xiong, Han-Duo Shi, Yi-Nan Wang, Li Jing, Jin Lei et al.
We study a general quantum key distribution protocol in higher dimension. In this protocol, quantum states in arbitrary g+1 (1<=g<=d) out of all d+1 mutually unbiased bases in a d-dimensional system can be used for the key encoding. This provides a natural generalization of the quantum key distribut ... [Phys. Rev. A 85, 012334 ] published .
Quantum One-Time Pad in the Presence of an Eavesdropper
Fernando G. S. L. Brandao and Jonathan Oppenheim
A classical one-time pad allows two parties to send private messages over a public classical channelan eavesdropper who intercepts the communication learns nothing about the message. A quantum one-time pad is a shared quantum state which allows two parties to send private messages or private quantum ... [Phys. Rev. Lett. 108, 040504 ] published .
Quantum privacy witness
Konrad Banaszek, Karol Horodecki, and Pawel Horodecki
While it is usually known that the mean value of a single observable is enough to detect entanglement or its distillability, the counterpart of such an approach in the case of quantum privacy has been missing. Here we develop the concept of a privacy witness, i.e., a single observable that may detec ... [Phys. Rev. A 85, 012330 ] published .
Private and quantum capacities of more capable and less noisy quantum channels
Shun Watanabe
Two classes of quantum channels, which we call more capable and less noisy, are introduced. The more capable class consists of channels such that the quantum capacities of the complementary channels to the environments are zero. The less noisy class consists of channels such that the private capacit ... [Phys. Rev. A 85, 012326 ] published .
Fast protocols for local implementation of bipartite nonlocal unitaries
Li Yu, Robert B. Griffiths, and Scott M. Cohen
In certain cases the communication time required to deterministically implement a nonlocal bipartite unitary using prior entanglement and local operations and classical communication can be reduced by a factor of two. We introduce two such fast protocols and illustrate them with various examples. Fo ... [Phys. Rev. A 85, 012304 ] published .
One-sided device-independent quantum key distribution: Security, feasibility, and the connection with steering
Cyril Branciard, Eric G. Cavalcanti, Stephen P. Walborn, Valerio Scarani, and Howard M. Wiseman
We analyze the security and feasibility of a protocol for quantum key distribution (QKD) in a context where only one of the two parties trusts his measurement apparatus. This scenario lies naturally between standard QKD, where both parties trust their measurement apparatuses, and device-independent ... [Phys. Rev. A 85, 010301 ] published .
Fair and optimistic quantum contract signing
N. Paunkovic, J. Bouda, and P. Mateus
We present a fair and optimistic quantum-contract-signing protocol between two clients that requires no communication with the third trusted party during the exchange phase. We discuss its fairness and show that it is possible to design such a protocol for which the probability of a dishonest client ... [Phys. Rev. A 84, 062331 ] published .
Security problem on arbitrated quantum signature schemes
Jeong Woon Choi, Ku-Young Chang, and Dowon Hong
Many arbitrated quantum signature schemes implemented with the help of a trusted third party have been developed up to now. In order to guarantee unconditional security, most of them take advantage of the optimal quantum one-time encryption based on Pauli operators. However, in this paper we point o ... [Phys. Rev. A 84, 062330 ] published .
An Application of Chaotic Chua's System for Secure Chaotic Communication Based on Sliding Mode observer
K. Kemih, M. Halimi, M. Ghanes, and G. Zhang
In this paper, we study the design and implementation of analog secure communication systems via synchronized chaotic Chua's circuit with sliding mode observer. For this, we adopt an approach based on an inclusion of the message in the transmitter and in the receiver; we use a sliding mode observer ... [AIP Conf. Proc. 1400, 344 (2011)] published Wed Dec 28, 2011.
Performance Analysis of Ad Hoc Routing Protocols in City Scenario for VANET
Sanjoy Das, Ram Shringar Raw, and Indrani Das
In this paper, performance analysis of Location Aided Routing (LAR), AODV and DSR protocol in city scenarios has been done. The mobility model considered is Manhattan model. This mobility model used to emulate the movement pattern of nodes i.e., vehicles on streets defined by maps. Our objective is ... [AIP Conf. Proc. 1414, 257 (2011)] published Wed Dec 28, 2011.
Enhanced Weight based DSR for Mobile Ad Hoc Networks
Samant Verma and Sweta Jain
Routing in ad hoc network is a great problematic, since a good routing protocol must ensure fast and efficient packet forwarding, which isn't evident in ad hoc networks. In literature there exists lot of routing protocols however they don't include all the aspects of ad hoc networks as mobility, dev ... [AIP Conf. Proc. 1414, 248 (2011)] published Wed Dec 28, 2011.
Hacker tracking Security system for HMI
Rajeev Kumar Chauhan
Conventional Supervisory control and data Acquisition (SCADA) systems use PC, notebook, thin client, and PDA as a Client. Nowadays the Process Industries are following multi shift system that's why multi- client of different category have to work at a single human Machine Interface (HMI). They may h ... [AIP Conf. Proc. 1414, 245 (2011)] published Wed Dec 28, 2011.
A new lossless digital image encryption scheme
Narendra K. Pareek, Vinod Patidar, and Krishan K. Sud
We propose a new lossless digital image encryption scheme based on the permutation and substitution architecture. Initially, original image is divided into squared sub-images and then three layers of pixels corresponding to additive primary colours (RGB) of each sub-image are separated. Each layer o ... [AIP Conf. Proc. 1414, 183 (2011)] published Wed Dec 28, 2011.
Micro-Photoluminescence Characterization of Low Density Droplet GaAs Quantum Dots for Single Photon Sources
S.-K. Ha, S. Bounouar, J. D. Song, J. Y. Lim, F. Donatini et al.
The GaAs quantum dots in AlGaAs barriers were grown by droplet epitaxy, emitting around 700 nm in wavelength which is compatible with low cost Si based detectors. The excitation power dependent and time resolved micro-photoluminescence measurements identified optical characteristics of exciton and b ... [AIP Conf. Proc. 1399, 555 (2011)] published Wed Dec 28, 2011.
Polarization-entangled Photon Pairs From A Single GaAs Quantum Dot
Y. Arashida, T. Hanazawa, Y. Ogawa, and F. Minami
We have studied photon correlation measurements on the photoluminescence (PL) of a self-assembled single GaAs quantum dots (QD) under 8 K. The QD exhibited several peaks on the PL spectra arising from the recombination of multi-excitonic complexes. Photon correlation measurements show several photon ... [AIP Conf. Proc. 1399, 475 (2011)] published Wed Dec 28, 2011.
How to implement decoy-state quantum key distribution for a satellite uplink with 50-dB channel loss
Evan Meyer-Scott, Zhizhong Yan, Allison MacDonald, Jean-Philippe Bourgoin, Hannes Hubel et al.
Quantum key distribution (QKD) takes advantage of fundamental properties of quantum physics to allow two distant parties to share a secret key; however, QKD is hampered by a distance limitation of a few hundred kilometers on Earth. The most immediate solution for global coverage is to use a satellit ... [Phys. Rev. A 84, 062326 ] published .
Long-distance continuous-variable quantum key distribution with a Gaussian modulation
Paul Jouguet, Sebastien Kunz-Jacques, and Anthony Leverrier
We designed high-efficiency error correcting codes allowing us to extract an errorless secret key in a continuous-variable quantum key distribution (CVQKD) protocol using a Gaussian modulation of coherent states and a homodyne detection. These codes are available for a wide range of signal-to-noise ... [Phys. Rev. A 84, 062317 ] published .
Decoherence and the retrieval of lost information
Yin Ye, Yunshan Cao, Xin-Qi Li, and Shmuel Gurvitz
We show that, contrary to common prejudice, a measurement of an open quantum system can reduce its decoherence rate. We demonstrate this in an example of indirect measurement of a qubit, where information regarding its state is hidden in the environment. This information is extracted by a distant de ... [Phys. Rev. B 84, 245311 ] published .
Attacking a practical quantum-key-distribution system with wavelength-dependent beam-splitter and multiwavelength sources
Hong-Wei Li, Shuang Wang, Jing-Zheng Huang, Wei Chen, Zhen-Qiang Yin et al.
It is well known that the unconditional security of quantum-key distribution (QKD) can be guaranteed by quantum mechanics. However, practical QKD systems have some imperfections, which can be controlled by the eavesdropper to attack the secret key. With current experimental technology, a realistic b ... [Phys. Rev. A 84, 062308 ] published .
NEW PUBLIC KEY CRYPTOSYSTEM BASED ON SEMIRINGS AND SEMIMODULES
Ivan D. Trendafilov and Mariana I. Durcheva
The purpose of this paper is to show how semirings can be used to build semigroup actions in the context of our new cryptosystem. ... [AIP Conf. Proc. 1410, 331 (2011)] published Tue Dec 6, 2011.
Tomography of the quantum state of photons entangled in high dimensions
Megan Agnew, Jonathan Leach, Melanie McLaren, F. Stef Roux, and Robert W. Boyd
Systems entangled in high dimensions have recently been proposed as important tools for various quantum information protocols, such as multibit quantum key distribution and loophole-free tests of nonlocality. It is therefore important to have precise knowledge of the nature of such entangled quantum ... [Phys. Rev. A 84, 062101 ] published .