Title :
Secure key rate of the BB84 protocol using finite sample bits
Author :
Sano, Yousuke ; Matsumoto, Ryutaroh ; Uyematsu, Tomohiko
Author_Institution :
Dept. of Commun. & Integrated Syst., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
We improve the non-asymptotic key rate shown by Scarani and Renner by proposing several methods to construct tighter conservative confidence interval of the phase error rate than the one shown by them. In addition, we show that the accurate channel estimation method non-asymptotically increases the key rate over the amplitude damping channel as well as the asymptotic case in the BB84 protocol.
Keywords :
channel estimation; cryptographic protocols; quantum cryptography; BB84 protocol; amplitude damping channel; channel estimation method; conservative confidence interval; finite sample bits; nonasymptotic key rate; phase error rate; secure key rate; Channel estimation; Damping; Error analysis; Error correction; Information science; Performance analysis; Privacy; Protocols; Security; Statistics;
Conference_Titel :
Information Theory Proceedings (ISIT), 2010 IEEE International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-7890-3
Electronic_ISBN :
978-1-4244-7891-0
DOI :
10.1109/ISIT.2010.5513653
