Finite Key Size Analysis of Two-Way Quantum Cryptography

Entropy

Jesni Shamsul Shaari¹  Stefano Mancini² 

[1] Faculty of Science, International Islamic University Malaysia (IIUM), Jalan Sultan Ahmad Shah, Bandar Indera Mahkota, 25200 Kuantan, Pahang, Malaysia;School of Science & Technology, University of Camerino, I-62032 Camerino, Italy;

关键词: quantum cryptography;    quantum measurement theory;    entropy and other measures of information;   

DOI  :  10.3390/e17052723

来源: DOAJ

【 摘 要 】

Quantum cryptographic protocols solve the longstanding problem of distributing a shared secret string to two distant users by typically making use of one-way quantum channel. However, alternative protocols exploiting two-way quantum channel have been proposed for the same goal and with potential advantages. Here, we overview a security proof for two-way quantum key distribution protocols, against the most general eavesdropping attack, that utilize an entropic uncertainty relation. Then, by resorting to the “smooth” version of involved entropies, we extend such a proof to the case of finite key size. The results will be compared to those available for one-way protocols showing some advantages.

【 授权许可】

Unknown