量子物理セミナー (鶴丸 豊広 氏)

開催日時

2020/10/22(木)15:00~16:00

開催場所

研究本館3Fセミナールーム Kenkyu Honkan 3F Seminar Room

講演者

鶴丸 豊広氏 Dr. Toyohiro Tsurumaru (三菱電機株式会社 Mitsubishi electric corp.)

言語

日本語

詳細ページ

お問い合わせ

理論センター317室 森 (YUICHIRO-AT-POST.KEK.JP)


概要

WE SHOW THAT THE MAYERS-SHOR-PRESKILL APPROACH AND RENNER’S APPROACH TO PROVING THE SECURITY OF QUANTUM KEY DISTRIBUTION (QKD) ARE ESSENTIALLY THE SAME. WE BEGIN OUR ANALYSIS BY CONSIDERING A SPECIAL CASE OF QKD CALLED PRIVACY AMPLIFICATION (PA). PA ITSELF IS AN IMPORTANT BUILDING BLOCK OF CRYPTOGRAPHY, BOTH CLASSICAL AND QUANTUM. THE STANDARD THEORETICAL TOOL USED FOR ITS SECURITY PROOF IS CALLED THE LEFTOVER HASHING LEMMA (LHL). WE PRESENT A DIRECT CONNECTION BETWEEN THE LHL AND THE CODING THEOREM OF A CERTAIN QUANTUM ERROR CORRECTION CODE. THEN WE APPLY THIS RESULT TO PROVING THE EQUIVALENCE BETWEEN THE TWO APPROACHES TO PROVING THE SECURITY OF QKD.

(References)

・T. Tsurumaru, “Leftover Hashing From Quantum Error Correction: Unifying the Two Approaches to the Security Proof of Quantum Key Distribution,” in IEEE Transactions on Information Theory, vol. 66, no. 6, pp. 3465-3484, June 2020, (arXiv:1809.05479).

新型コロナウイルス感染症対策のため、人数を制限して実施いたします。
参加希望者は事前に理論センター317室 森 (YUICHIRO-AT-POST.KEK.JP) まで連絡ください。