Kiyoshi Tamaki

Bridging the gap between theory and practice in quantum cryptography

2015 · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Quantum key distribution (QKD) needs to close the big gap between theory and practice to be a suitable technology for achieving information-theoretic secure communications. Indeed, recent studies on side-channel attacks have exposed the vulnerabilities of …

Security of quantum key distribution with light sources that are not independently and identically distributed

2016 · Physical Review A

Although quantum key distribution (QKD) is theoretically secure, there is a gap between the theory and practice. In fact, real-life QKD may not be secure because component devices in QKD systems may deviate from the …

Foundation of Quantum Cryptography and Its Future

2016 · The Journal of the Institute of Electrical Engineers of Japan

1．量子暗号の必要性 インターネットが普及した現代の生活では，個人情報などの重要情報がインターネット上で送信される機会が多い。例えば，インターネット上で買い物をする時には，注文者の個人情報をショップへ送信することが多い。このような重要情報を送信する際，ショップ以外の第三者には情

Quantum key distribution with setting-choice-independently correlated light sources

2019 · npj Quantum Information

Abstract Despite the enormous theoretical and experimental progress made so far in quantum key distribution (QKD), the security of most existing practical QKD systems is not rigorously established yet. A critical obstacle is that almost …

Finite-key security analysis of differential-phase-shift quantum key distribution

2023 · arXiv (Cornell University)

Differential-phase-shift (DPS) quantum key distribution (QKD) is one of the major QKD protocols that can be implemented with a simple setup using a laser source and a passive detection unit. Recently, an information-theoretic security proof …