• Journal of Information Processing Systems
• /
• 제16권6호
• /
• pp.1459-1478
• /
• 2020

In the last few years, quantum communication technology and services have been developing in various advanced applications to secure the sharing of information from one device to another. It is a classical commercial medium, where several Internet of Things (IoT) devices are connected to information communication technology (ICT) and can communicate the information through quantum systems. Digital communications for future networks face various challenges, including data traffic, low latency, deployment of high-broadband, security, and privacy. Quantum communication, quantum sensors, quantum computing are the solutions to address these issues, as mentioned above. The secure transaction of data is the foremost essential needs for smart advanced applications in the future. In this paper, we proposed a quantum communication model system for future ICT and methodological flow. We show how to use blockchain in quantum computing and quantum cryptography to provide security and privacy in recent information sharing. We also discuss the latest global research trends for quantum communication technology in several countries, including the United States, Canada, the United Kingdom, Korea, and others. Finally, we discuss some open research challenges for quantum communication technology in various areas, including quantum internet and quantum computing.

• Journal of Information Science Theory and Practice
• /
• 제10권spc호
• /
• pp.123-134
• /
• 2022

Existing network cryptography systems are threatened by recent developments in quantum computing. For example, the Shor algorithm, which can be run on a quantum computer, is capable of overriding public key-based network cryptography systems in a short time. Therefore, research on new cryptography systems is actively being conducted. The most powerful cryptography systems are quantum key distribution (QKD) and post quantum cryptograph (PQC) systems; in this study, a network based on both QKD and PQC is proposed, along with a quantum key management system (QKMS) and a Q-controller to efficiently operate the network. The proposed quantum cryptography communication network uses QKD as its backbone, and replaces QKD with PQC at the user end to overcome the shortcomings of QKD. This paper presents the functional requirements of QKMS and Q-Controller, which can be utilized to perform efficient network resource management.

• International Journal of Internet, Broadcasting and Communication
• /
• 제13권2호
• /
• pp.1-6
• /
• 2021

For competitive hotel business, the hotel must have a sound prediction capability to balance the demand and supply of hospitality products. To have a sound prediction capability in the hotel, it should be prepared to be equipped with a new technology such as quantum computing. The quantum computing is a brand new cutting-edge technology. It will change hotel business and even the whole world too. Therefore, we study the impact of quantum computing on supply chain management (SCM) and hotel performance. Toward the goal we have developed the research model including six constructs: quantum (computing) prediction, communication, supplier relationship, service quality, non-financial performance, and financial performance. The result of the study shows a significant influence of quantum (computing) prediction on hotel performance through the mediating role of SCM in the hotel. Quantum prediction is highly significant in enhancing the SCM in the hotel. However, the direct effect between the quantum prediction and hotel performance is not significant. The finding indicates that hotels which would install the quantum computing technology and utilize the quantum prediction could hugely benefit from the performance improvement.

• Journal of the Korean Statistical Society
• /
• 제30권2호
• /
• pp.291-325
• /
• 2001

The paper is a tutorial introduction to quantum information theory, developing the basic model and emphasizing the role of statistics and probability.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제9권2호
• /
• pp.564-582
• /
• 2015

This paper proposes a novel swarm intelligence optimization method which integrates bacterial foraging optimization (BFO) with quantum computing, called quantum bacterial foraging optimization (QBFO) algorithm. In QBFO, a multi-qubit which can represent a linear superposition of states in search space probabilistically is used to represent a bacterium, so that the quantum bacteria representation has a better characteristic of population diversity. A quantum rotation gate is designed to simulate the chemotactic step for the sake of driving the bacteria toward better solutions. Several tests are conducted based on benchmark functions including multi-peak function to evaluate optimization performance of the proposed algorithm. Numerical results show that the proposed QBFO has more powerful properties in terms of convergence rate, stability and the ability of searching for the global optimal solution than the original BFO and quantum genetic algorithm. Furthermore, we examine the employment of our proposed QBFO for cognitive radio spectrum allocation. The results indicate that the proposed QBFO based spectrum allocation scheme achieves high efficiency of spectrum usage and improves the transmission performance of secondary users, as compared to color sensitive graph coloring algorithm and quantum genetic algorithm.

• 한국위성정보통신학회논문지
• /
• 제7권1호
• /
• pp.21-26
• /
• 2012

우리나라는 지난 20여 년 디지털 정보기술 강국을 지향해 왔지만 선진국에서 이미 투자를 시작한 양자 정보 과학 분야에 대한 연구 및 투자는 거의 이루어지지 않았으며, 양자 정보 통신 기술의 수준 또한 개발 선진국들에 비해 턱없이 부족한 상황이다. 최근, 양자역학에 기반을 두고 있는 양자 정보 처리 및 통신에 대한 연구가 세계적으로 활발히 진행 중이다. 90년대부터 본격화된 양자정보이론의 연구는 양자 컴퓨팅, 양자 통신, 양자 정보이론 등의 분야에서 발전해오고 있으며, 90년대 말에 이르러 양자 암호 통신 및 양자 알고리즘 등의 분야에서 큰 연구 성과를 나타내기 시작하였다. 본 논문에서는, 양자 통신 시스템에서 효율적인 양자 신호 전송 및 검출을 위해 직교 시퀀스를 이용한 효율적인 양자 신호 검출 방안에 대해 논하고자 한다.

• 융합보안논문지
• /
• 제21권1호
• /
• pp.3-7
• /
• 2021

양자 역학을 기반으로 하는 양자암호통신에서는 각각의 정보를 개별적인 광자에 실어 전송하기 때문에 일부만 도청하는 것이 기본적으로 불가능하며, 침입자가 광자를 불법적으로 가로채 수신자에게 재전송을 하여도 양자 복제 불가능성 원리에 의해 같은 정보를 광자에 실어 보내는 것이 불가능하다. 한편 네트워크 기반 다양한 서비스의 폭발적 증대와 함께 해당 서비스의 보안성 보장이 필수적으로 요구되면서 양자암호 통신망의 구축 및 관련 서비스가 다양한 형태로 추진되고 있다. 그러나 양자키 분배(QKD: Quantum Key Distribution) 기술의 발전과는 별개로 이를 활용한 네트워크 구축 및 다양한 양자암호 기반 서비스 제공 방안에 관해서는 많은 연구가 필요한 상태이다. 본 논문에서는 양자암호 장치를 기반으로, 다양한 양자암호 통신망 장비 간에 양자키를 전달하고 암호화된 전송환경 구현을 위한 통합 데이터 구조를 제안하였다.

• 전자통신동향분석
• /
• 제34권5호
• /
• pp.99-112
• /
• 2019

A quantum light source is an essential element for quantum information technology, including quantum communication, quantum sensor, and quantum computer. Quantum light sources including photon number state, entangled state, and squeezed state can be divided into two types according to the generation mechanism, namely single emitter and non-linear based systems. The single emitter platform contains atom/ion trap, solid-state defect/color center, two-dimensional material, and semiconductor quantum dot, which can emit deterministic photons. The non-linear based platform contains spontaneous parametric down-conversion and spontaneous four-wave mixing, which can emit probabilistic photon pairs. For each platform, we give an overview of the recent research trends of the generation, manipulation, and integration of single photon and entangled photon sources. The characteristics of quantum light sources are investigated for each platform. In addition, we briefly introduce quantum sensing, quantum communication, and quantum computing applications based on quantum light sources. We discuss the challenges and prospects of quantum light sources for quantum information technology.

• 한국정보통신학회논문지
• /
• 제21권12호
• /
• pp.2318-2324
• /
• 2017

차세대 암호로 대두 되고 있는 양자암호는 양자키전송 프로토콜과 양자비밀직접통신으로 나뉘어 연구되고 있다. 양자키전송 프로토콜은 사용상의 비효율성 때문에 현대암호와 병합하여 사용하거나 OTP를 포기한 형태로 사용될 수 있다. 본 고에서는 양자키전송이 아닌 직접통신을 양자암호화 하여 진행하는 알고리즘을 제안하였다. 양자비밀 직접통신을 구현하는 방식은 2채널 방식을 이용하였다. 두 채널 중 한쪽 채널에 아인슈타인의 중력장에의한 시간지연 함수를 적용하여 두 채널간 시간차를 적용하는 방식의 양자비밀직접통신 프로토콜을 설계 하였다. 제안하는 시간 지연 효과는 중력렌즈 현상을 반영한 것으로 점질량에 의한 시간지연을 제안하였다. 원심가속도를 이용한 중력 발생기는 점질량계에 포함되며 이를 이용한 시간지연은 중력계의 변화에 의한 상관관계를 보임을 알 수 있다.

• Journal of Information Processing Systems
• /
• 제17권1호
• /
• pp.151-162
• /
• 2021

Quantum information has passed the theoretical research period and has entered the realization step for its application to the information and communications technology (ICT) sector. Currently, quantum information has the advantage of being safer and faster than conventional digital computers. Thus, a lot of research is being done. The amount of big data that one needs to deal with is expected to grow exponentially. It is also a new business model that can change the landscape of the existing computing. Just as the IT sector has faced many challenges in the past, we need to be prepared for change brought about by Quantum. We would like to look at studies on quantum communication, quantum sensing, and quantum computing based on quantum information and see the technology levels of each country and company. Based on this, we present the vision and challenge for quantum information in the future. Our work is significant since the time for first-time study challengers is reduced by discussing the fundamentals of quantum information and summarizing the current situation.