전자통신동향분석 (Electronics and Telecommunications Trends)

한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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무선 양자암호통신 시스템 및 부품 최신 기술 동향

Recent Technology Trends of Free-Space Quantum Key Distribution System and Components

  • 발행 : 2018.12.01
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⟨ 이전 논문 다음 논문 ⟩

초록

A quantum key distribution (QKD) provides in principle an unconditional secure communication unlike the standard public key cryptography depending on the computational complexity. In particular, free-space QKD can give a secure solution even without a fiber-based infrastructure. In this paper, we investigate an overview of recent research trends in the free-space QKD system, including satellite and handheld moving platforms. In addition, we show the key components for a free-space QKD system such as the integrated components, single photon detectors, and quantum random number generator. We discuss the technical challenges and progress toward a future free- space QKD system and components.

키워드

HJTOCM_2018_v33n6_94_f0001.png 이미지

(그림 3) Short Range Consumer QKD 예시

HJTOCM_2018_v33n6_94_f0002.png 이미지

(그림 4) ETRI 무선 양자키분배 송신부 및 수신부 시스템

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(그림 1) 양자암호통신 시스템 구성도

HJTOCM_2018_v33n6_94_f0004.png 이미지

(그림 2) 인공위성 기반 대륙간 무선양자암호통신 (2018 중국)

HJTOCM_2018_v33n6_94_f0005.png 이미지

(그림 5) 무선 양자키분배 송수신부 핵심 부품 구성도

HJTOCM_2018_v33n6_94_f0006.png 이미지

(그림 6) 핸드헬드(hand-held) 형태의 송신기 및 수신기[14]

HJTOCM_2018_v33n6_94_f0007.png 이미지

(그림 7) 실리콘포토닉스 기반 양자암호통신용 송신기 칩[26]

HJTOCM_2018_v33n6_94_f0008.png 이미지

(그림 8) ETRI 실리카 도파로 집적화 칩기반 편광 모듈

HJTOCM_2018_v33n6_94_f0009.png 이미지

(그림 9) Si-APD 기반 SPAD의 광자 검출 효율

HJTOCM_2018_v33n6_94_f0010.png 이미지

(그림 10) InP 반도체 광회로 기반 양자 난수 생성기[34]

HJTOCM_2018_v33n6_94_f0011.png 이미지

(그림 11) LED 출력 및 CMOS 이미지 센서 기반 양자 난수 생성기

<표 1> 무선 양자암호통신 주요 국외 기술 개발 현황

HJTOCM_2018_v33n6_94_t0001.png 이미지

<표 2> 상용 Si-APD 기반 SPAD 모듈의 성능 비교

HJTOCM_2018_v33n6_94_t0002.png 이미지

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