Security of continuous-variable quantum cryptography

被引：102

作者：

Ralph, TC ^{[1
]}

机构：

[1] Univ Queensland, Ctr Laser Sci, Dept Phys, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2000年 / 62卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.62.062306

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We discuss a quantum key distribution scheme in which small phase and amplitude modulations of cw light beams carry the key information The presence of EPR-type correlations provides the quantum protection. We identify universal constraints on the level of shared information between the intended receiver (Bob) and any eavesdropper (Eve) and use this to make a general evaluation of security. We identify teleportation as an optimum eavesdropping technique.

引用

页码：062306 / 062301

页数：7

共 22 条

[1] QUANTUM CORRELATIONS - A GENERALIZED HEISENBERG UNCERTAINTY RELATION [J].

ARTHURS, E ;

GOODMAN, MS .

PHYSICAL REVIEW LETTERS, 1988, 60 (24) :2447-2449

[2] The principles of quantum cryptography [J].

Barnett, SM ;

Phoenix, SJD .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1996, 354 (1708) :793-803

[3]

Bennett C., UNPUB

[4] QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].

BENNETT, CH .

PHYSICAL REVIEW LETTERS, 1992, 68 (21) :3121-3124

[5] Teleportation of continuous quantum variables [J].

Braunstein, SL ;

Kimble, HJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :869-872

[6] Free-space quantum-key distribution [J].

Buttler, WT ;

Hughes, RJ ;

Kwiat, PG ;

Luther, GG ;

Morgan, GL ;

Nordholt, JE ;

Peterson, CG ;

Simmons, CM .

PHYSICAL REVIEW A, 1998, 57 (04) :2379-2382

[7] Coherent eavesdropping strategies for the four state quantum cryptography protocol [J].

Cirac, JI ;

Gisin, N .

PHYSICS LETTERS A, 1997, 229 (01) :1-7

[8] Can quantum-mechanical description of physical reality be considered complete? [J].

Einstein, A ;

Podolsky, B ;

Rosen, N .

PHYSICAL REVIEW, 1935, 47 (10) :0777-0780

[9] QUANTUM CRYPTOGRAPHY BASED ON BELL THEOREM [J].

EKERT, AK .

PHYSICAL REVIEW LETTERS, 1991, 67 (06) :661-663

[10] Quantum-state disturbance versus information gain: Uncertainty relations for quantum information [J].

Fuchs, CA ;

Peres, A .

PHYSICAL REVIEW A, 1996, 53 (04) :2038-2045

← 1 2 3 →