Entangled eavesdropping in quantum key distribution

Brandt, Howard E.

doi:10.1080/09500340600895383

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…It seems that CNOT operation acting on a single qubit of Eve's ancilla: Q = CN OT tx , |χ E = |0 x , |φ E = |1 x , |a E = |0 x , |d E = |1 x is the simplest realization of the logic behind the attack. Such version is also practically feasible as the attacks involving probes entangled via the CNOT operation have been already proposed in the QKD context [26,27]. As a result, both, the CNOT and P circuits are equivalent in terms of provided information gain, detectability and practical feasibility.…”

Section: B Equivalence Of P and Cnot Circuitsmentioning

confidence: 99%

A General Scheme for Information Interception in the Ping-Pong Protocol

Zawadzki

Miszczak

2016

Advances in Mathematical Physics

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The existence of an undetectable eavesdropping of dense coded information has been already demonstrated by Pavičić for the quantum direct communication based on the ping-pong paradigm. However, a) the explicit scheme of the circuit is only given and no design rules are provided, b) the existence of losses is implicitly assumed, c) the attack has been formulated against qubit based protocol only and it is not clear whether it can be adapted to higher dimensional systems. These deficiencies are removed in the presented contribution.A new generic eavesdropping scheme built on a firm theoretical background is proposed. In contrast to the previous approach, it does not refer to the properties of the vacuum state, so it is fully consistent with the absence of losses assumption. Moreover, the scheme applies to the communication paradigm based on signal particles of any dimensionality. It is also shown that some well known attacks are special cases of the proposed scheme. * Piotr.Zawadzki@polsl.pl † miszczak@iitis.pl

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Section: B Equivalence Of P and Cnot Circuitsmentioning

confidence: 99%

A General Scheme for Information Interception in the Ping-Pong Protocol

Zawadzki

Miszczak

2016

Advances in Mathematical Physics

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Quantum Direct Communication Wiretapping

Zawadzki

2017

Computer Networks

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Performance Analysis for Brandt’s Conclusive Entangling Probe

Shapiro

2006

Quantum Inf Process

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The Fuchs-Peres-Brandt (FPB) probe realizes the most powerful individual attack on Bennett-Brassard 1984 quantum key distribution by means of a single controlled-NOT gate in which Alice's transmitted qubit becomes the control-qubit input, Bob's received qubit is the control-qubit output, and Eve supplies the target-qubit input and measures the target-qubit output. The FPB probe uses the minimum-error-probability projective measurement for discriminating between the target-qubit output states that are perfectly correlated with Bob's sifted bit value when that bit is correctly received. This paper analyzes a recently proposed modification of the FPB attack in which Eve's projective measurement is replaced by a probability operator-valued measurement chosen to unambiguously discriminate between the same two target-qubit output states.

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Entangled eavesdropping in quantum key distribution

Cited by 4 publications

References 7 publications

A General Scheme for Information Interception in the Ping-Pong Protocol

A General Scheme for Information Interception in the Ping-Pong Protocol

Quantum Direct Communication Wiretapping

Performance Analysis for Brandt’s Conclusive Entangling Probe

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