scholarly journals Analysis of Trojan-Horse Attack against Untrusted Source

2018 ◽  
Vol 08 (01) ◽  
pp. 59-66
Author(s):  
家涛 于
Keyword(s):  
Trojan Horse ◽  
Trojan Horse Attack

A qutrit quantum key distribution protocol using Bell inequalities with larger violation capabilities

2015 ◽  
Vol 15 (15&16) ◽  
pp. 1295-1306
Author(s):  
Zoe Amblard ◽  
Francois Arnault
Keyword(s):  
Quantum Key Distribution ◽  
Bell Inequality ◽  
Bell Inequalities ◽  
Key Distribution ◽  
Trojan Horse ◽  
Noise Resistance ◽  
The One ◽  
Trojan Horse Attack ◽  
Quantum Key Distribution Protocol

The Ekert quantum key distribution protocol [1] uses pairs of entangled qubits and performs checks based on a Bell inequality to detect eavesdropping. The 3DEB protocol [2] uses instead pairs of entangled qutrits to achieve better noise resistance than the Ekert protocol. It performs checks based on a Bell inequality for qutrits named CHSH-3 and found in [3, 4]. In this paper, we present a new protocol, which also uses pairs of entangled qutrits, but gaining advantage of a Bell inequality which achieves better noise resistance than the one used in 3DEB. The latter inequality is called here hCHSH-3 and was discovered in [5]. For each party, the hCHSH-3 inequality involves four observables already used in CHSH-3 but also two products of observables which do not commute. We explain how the parties can measure the observables corresponding to these products and thus are able to check the violation of hCHSH-3. In the presence of noise, this violation guarantees the security against a local Trojan horse attack. We also designed a version of our protocol which is secure against individual attacks.

Lightweight mediated semi-quantum key distribution protocol

2019 ◽  
Vol 34 (34) ◽  
pp. 1950281 ◽  
Author(s):  
Chia-Wei Tsai ◽  
Chun-Wei Yang ◽  
Narn-Yih Lee
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Trojan Horse ◽  
Third Party ◽  
Secret Key ◽  
Photon Detector ◽  
Transmission Strategy ◽  
Secret Keys ◽  
The One ◽  
Trojan Horse Attack

Classical users can share a secret key with a quantum user by using a semi-quantum key distribution (SQKD) protocol. Allowing two classical users to share a secret key is the objective of the mediated semi-quantum key distribution (MSQKD) protocol. However, the existing MSQKD protocols need a quantum user to assist two classical users in distributing the secret keys, and these protocols require that the classical users be equipped with a Trojan horse photon detector. This reduces the practicability of the MSQKD protocols. Therefore, in this study we propose a lightweight MSQKD, in which the two participants and third party are classical users. Due to the usage of the one-way transmission strategy, the proposed lightweight MSQKD protocol is free from quantum Trojan horse attack. The proposed MSQKD is more practical than the existing MSQKD protocols.

scholarly journals Invisible Trojan-horse attack

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Shihan Sajeed ◽  
Carter Minshull ◽  
Nitin Jain ◽  
Vadim Makarov
Keyword(s):  
Trojan Horse ◽  
Trojan Horse Attack

Practical quantum private query based on Bell state

2019 ◽  
Vol 34 (24) ◽  
pp. 1950196 ◽  
Author(s):  
Tao Zheng ◽  
Shibin Zhang ◽  
Xiang Gao ◽  
Yan Chang
Keyword(s):  
Privacy Protection ◽  
Photon Number ◽  
Bell State ◽  
Trojan Horse ◽  
User Privacy ◽  
Quantum Private Query ◽  
Secret Information ◽  
Malicious Behavior ◽  
Wavelength Filter ◽  
Trojan Horse Attack

Quantum private query (QPQ) is a cryptographic application that protects the privacy of both users and databases while querying the database secretly. In most existing QPQ protocols, the protection of user privacy can only be cheat-sensitive. Cheat-sensitive means that Bob will be found later with a certain probability if he tries to get the address queried by Alice. On the premise of cheat-sensitivity, although Alice can discover Bob’s malicious behavior after a query (transaction), the secret information of Alice was leaked in the completed query, which is likely to be a fatal blow to Alice. Or, to prevent Bob’s malicious behavior, Alice executes one or more additional queries to test Bob’s honesty. However, to bypass Alice’s honesty test, Bob can also provide several honest queries before performing dishonest queries. Therefore, cheat-sensitive should not be the ultimate goal of user privacy protection in QPQ. In this paper, we propose a practical QKD-based QPQ protocol with better user privacy protection than cheat-sensitivity based on order rearrangement of qubits. The proposed QPQ protocol can resist the Trojan horse attack even without wavelength filter and photon number splitter (PNS) equipped with auxiliary monitoring detectors.

Counterfactual Trojan horse attack

2020 ◽  
Vol 101 (2) ◽  
Author(s):  
Zheng-Hong Li ◽  
Luojia Wang ◽  
Jingping Xu ◽  
Yaping Yang ◽  
M. Al-Amri ◽  
...  
Keyword(s):  
Trojan Horse ◽  
Trojan Horse Attack

scholarly journals Practical Security Bounds Against the Trojan-Horse Attack in Quantum Key Distribution

2015 ◽  
Vol 5 (3) ◽  
Author(s):  
M. Lucamarini ◽  
I. Choi ◽  
M. B. Ward ◽  
J. F. Dynes ◽  
Z. L. Yuan ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Trojan Horse ◽  
Trojan Horse Attack ◽  
Practical Security

scholarly journals Publisher Correction: Invisible Trojan-horse attack

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Shihan Sajeed ◽  
Carter Minshull ◽  
Nitin Jain ◽  
Vadim Makarov
Keyword(s):  
Trojan Horse ◽  
Trojan Horse Attack
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