An Improved Quantum Information Hiding Protocol Based on Entanglement Swapping of χ-type Quantum States

被引：0

作者：

徐淑奖 ^{[1
]}

陈秀波 ^{[2
]}

王连海 ^{[1
]}

丁青艳 ^{[1
]}

张淑慧 ^{[1
]}

机构：

[1] Shandong Provincial Key Laboratory of Computer Networks, Shandong Computer Science Center (National Supercomputer Center in Jinan)

[2] Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications

来源：

CommunicationsinTheoreticalPhysics | 2016年 / 65卷 / 06期

基金：

中国国家自然科学基金;

关键词：

quantum communication; quantum information hiding; χ-type quantum state; entanglement swapping;

D O I：

暂无

中图分类号：

O413 [量子论]; TP309 [安全保密];

学科分类号：

070201 ; 081201 ; 0839 ; 1402 ;

摘要：

In 2011, Qu et al. proposed a quantum information hiding protocol based on the entanglement swapping of χ-type quantum states. Because a χ-type state can be described by the 4-particle cat states which have good symmetry,the possible output results of the entanglement swapping between a given χ-type state and all of the 16 χ-type states are divided into 8 groups instead of 16 groups of different results when the global phase is not considered. So it is difficult to read out the secret messages since each result occurs twice in each line(column) of the secret messages encoding rule for the original protocol. In fact, a 3-bit instead of a 4-bit secret message can be encoded by performing two unitary transformations on 2 particles of a χ-type quantum state in the original protocol. To overcome this defect, we propose an improved quantum information hiding protocol based on the general term formulas of the entanglement swapping among χ-type states.

引用

页码：705 / 710

页数：6