• Title/Summary/Keyword: QKD

Search Result 20, Processing Time 0.035 seconds

Quantum Key Distribution System integrated with IPSec (양자키분배와 IPSec을 결합한 네트워크 보안 장치 연구)

  • Lee, Eunjoo;Sohn, Ilkwon;Shim, Kyuseok;Lee, Wonhyuk
    • Convergence Security Journal
    • /
    • v.21 no.3
    • /
    • pp.3-11
    • /
    • 2021
  • Most of the internet security protocols rely on classical algorithms based on the mathematical complexity of the integer factorization problem, which becomes vulnerable to a quantum computer. Recent progresses of quantum computing technologies have highlighted the need for applying quantum key distribution (QKD) on existing network protocols. We report the development and integration of a plug & play QKD device with a commercial IPSec device by replacing the session keys used in IPSec protocol with the quantum ones. We expect that this work paves the way for enhancing security of the star-type networks by implementing QKD with the end-to-end IP communication.

Performance of privacy Amplification in Quantum Key Distribution Systems (양자 키 분배 시스템에서 보안성 증폭의 성능 분석)

  • Lee, Sun-Yui;Kim, Jin-Young
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.18 no.5
    • /
    • pp.111-116
    • /
    • 2018
  • This paper introduces the concept of a random universal hash function to amplify security in a quantum key distribution system. It seems to provide security amplification using the relationship between quantum error correction and security. In addition, the approach in terms of security amplification shows that phase error correction offers better security. We explain how the universal hash function enhances security using the BB84 protocol, which is a typical example of QKD(Quantum Key Distribution). Finally, we show that the BB84 protocol using random privacy amplification is safe at higher key rates than Mayers' performance at the same error rate.

Plug & Play quantum cryptography system (Plug & Play 양자암호 시스템)

  • Lee, Kyung-Woon;Park, Chul-Woo;Park, Jun-Bum;Lee, Seung-Hun;Shin, Hyun-Jun;Park, Jung-Ho;Moon, Sung-Wook
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.44 no.3
    • /
    • pp.45-50
    • /
    • 2007
  • We present a auto compensating quantum key distribution system based on optical fiber at 1550nm. In the quantum key transmission system, main control board and phase modulation driving board are fabricated for auto controlling quantum key distribution(QKD). We tested the single photon counts per dark counts for a single photon detector, quantum key distribution rate($R_{sift}$) and the quantum bit error rate (QBER). Quantum bit error rate of 3.5% in 25km QKD is obtained. This system is commercially available.

Integrated Data Structure for Quantum Key Management in Quantum Cryptographic Network (양자암호 통신망에서 양자키 관리를 위한 통합 데이터 구조)

  • Kim, Hyuncheol
    • Convergence Security Journal
    • /
    • v.21 no.1
    • /
    • pp.3-7
    • /
    • 2021
  • In quantum cryptographic communication based on quantum mechanics, each piece of information is loaded onto individual photons and transmitted. Therefore, it is impossible to eavesdrop on only a part, and even if an intruder illegally intercepts a photon and retransmits it to the recipient, it is impossible to send the same information to the photon by the principle of quantum duplication impossible. With the explosive increase of various network-based services, the security of the service is required to be guaranteed, and the establishment of a quantum cryptographic communication network and related services are being promoted in various forms. However, apart from the development of Quantum Key Distribution (QKD) technology, a lot of research is needed on how to provide network-level services using this. In this paper, based on the quantum encryption device, we propose an integrated data structure for transferring quantum keys between various quantum encryption communication network devices and realizing an encrypted transmission environment.

Platform for Manipulating Polarization Modes Realized with Jones Vectors in MATHEMATICA

  • Choi, Yong-Dae;Kim, Bogyeong;Yun, Hee-Joong
    • Journal of Astronomy and Space Sciences
    • /
    • v.32 no.2
    • /
    • pp.151-159
    • /
    • 2015
  • The fundamental conception in physics of the propagation of the electromagnetic wave polarization in matter is newly understood as the cardinal keyword in free-space quantum communication technology and cosmology in astrophysics. Interactive visualization of the propagation mechanism of polarized electromagnetism in a medium with its helicity has accordingly received attention from scientists exploiting the protocol of quantum key distribution (QKD) to guarantee unconditional security in cryptography communication. We have provided a dynamic polarization platform for presenting the polarization modes of a transverse electromagnetic wave, converting the state of polarization through the arrangement of optical elements, using Jones vectors calculations in Methematica. The platform graphically simulates the mechanism of production and propagation of the polarized waves in a medium while satisfying Maxwell's equations.

AN Implement EKI system for TLS HANDSHAKE (SSL HANDSHAKE 보완을 위한 EKI(External Key Insert)기능의 구현)

  • Hong, se-young;Park, Jae-Pil
    • Proceedings of the Korean Society of Computer Information Conference
    • /
    • 2022.07a
    • /
    • pp.629-630
    • /
    • 2022
  • 본 논문에서는 SSL VPN 장비에서 사용되는 대칭키 교환을 위한 TLS HANDSHAKE 과정 중, 중간자 공격을 방어하기 위한 공유 대칭키를 별도로 주입하는 기능을 개발한다. 일반적으로 TLS 프로토콜은 공격자에 안전하다고 알려져 있으나 TLS 중간자 공격으로 대칭키가 노출될 위험이 존재한다. 또한 양자컴퓨팅의 발전으로 비대칭키 연산 역시 노출될 가능성이 대두되고 있다. 본 논문에서는 이렇한 공격들을 효과적으로 방어 할 수 있는 양자키분배기(QKD)로 부터 넘겨받은 양자키를 TLS HANDSHAKE 과정에 넣어 주어 이 같은 공격에 안전한 시스템을 구축할 수 있도록 구현한다.

  • PDF

Quantum Authentication and Key Distribution protocol based on one-time ID (일회용 ID 기반 양자 인증 및 키 분배 프로토롤)

  • Lee Hwa-Yean;Hong Chang-Ho;Lim Jong-in;Yang Hyung-Jin
    • Journal of the Korea Institute of Information Security & Cryptology
    • /
    • v.15 no.2
    • /
    • pp.73-80
    • /
    • 2005
  • We propose a Quantum Authentication and Key distribution protocol based on one-time n using one-way Hash function. The designated users can authenticate each other and the arbitrator using their one-time ID and distribute a quantum secret key using remained GHZ states after authentication procedure. Though the help of the arbitrator is needed in the process of authentication and key distribution, our protocol prevents the arbitrator from finding out the shared secret key even if the arbitrator becomes an active attacker. Unconditional security can be proved in our protocol as the other QKD protocols.

Quantum Secure Direct Community using Time Lag (시간지연을 이용한 양자비밀직접통신)

  • Rim, Kwang-cheol;Lim, Dong-ho
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.21 no.12
    • /
    • pp.2318-2324
    • /
    • 2017
  • Quantum cryptography, which is emerging as a next generation password, is being studied by quantum cryptographic transfer protocols and quantum secret communication. Quantum key transfer protocol can be used in combination with the modern password because of the inefficiency of the use of the password, or the use of OTP(one time password). In this paper an algorithm for direct communication by means of direct cryptographic communications rather than quantum keys. The method of implementing quantum secure direct community was adopted using 2-channel methods using Einstein gravity field. Two channels were designed to adopt a quantum secret communication protocol that applies time delay between 2-channels of channel to apply time difference between 2-channels. The proposed time delay effect reflects the time delay by reflecting the gravitational lensing phenomenon. Gravity generator with centrifugal acceleration is incorporated in the viscometer, and the time delay using this implies the correlation between the variance of the metametry.

Privacy Amplification of Correlated Key Decryption over Public Channels (공개 채널을 통한 상관 키 분산 암호화의 프라이버시 증폭)

  • Lee, Sun-Yui;Kim, Jin-Young
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.18 no.4
    • /
    • pp.73-78
    • /
    • 2018
  • In this paper, we consider a system where multiple sources are encrypted in separated nodes and sent through their respective public communication channels into a joint sink node. We are interested at the problem on protecting the security of an already existing system such above, which is found out to have correlated encryption keys. In particular, we focus on finding a solution without introducing additional secret keys and with minimal modification to minimize the cost and the risk of bringing down an already running system. We propose a solution under a security model where an eavesdropper obtains all ciphertexts, i.e., encrypted sources, by accessing available public communication channels. Our main technique is to use encoders of universal function to encode the ciphertexts before sending them to public communication channels.

A study on Performance Evaluation for Network Architecture using Quantum Key Distribution Technology (양자암호기반의 통신망 구축 및 성능시험 검증연구)

  • Lee, Wonhyuk;Seok, Woojin;Park, Chanjin;Kwon, Woochang;Sohn, Ilkwon;Kim, Seunghae;Park, Byoungyoen
    • KNOM Review
    • /
    • v.22 no.2
    • /
    • pp.39-47
    • /
    • 2019
  • There are several big data-driven advanced research activities such as meteorological climate information, high energy physics, astronomy research, satellite information data, and genomic research data on KREONET. Since the performance degradation occurs in the environment with the existing network security equipment, methods for preventing the performance degradation on the high-performance research-only network and for high-speed research collaboration are being studied. In addition, the recent issue of quantum computers has been a threat to security using the existing encryption system. In this paper, we construct quantum cryptography-based communication network through environment construction and high-performance transmission test that build physical security through quantum cryptography-based communication network in end-to-end high-speed research network. The purpose of this study is to analyze the effect on network performance when performing physical encryption and to use it as basic data for constructing high-performance research collaboration network.