Sagnac quantum key distribution and secret sharing

2009 ◽  
Author(s):  
Jan Bogdanski ◽  
Johan Ahrens ◽  
Mohamed Bourennane
Keyword(s):  
Secret Sharing ◽  
Quantum Key Distribution ◽  
Key Distribution

Cryptanalysis and improvement of the novel semi-quantum secret sharing scheme based on Bell states

2018 ◽  
Vol 32 (25) ◽  
pp. 1850294 ◽  
Author(s):  
Bingren Chen ◽  
Wei Yang ◽  
Liusheng Huang
Keyword(s):  
Secret Sharing ◽  
Quantum Key Distribution ◽  
Quantum Secret Sharing ◽  
Key Distribution ◽  
Bell States ◽  
Secret Sharing Scheme ◽  
The Novel ◽  
Improvement Strategy ◽  
Sharing Scheme ◽  
Quantum Secret Sharing Scheme

A recent paper proposed a semi-quantum secret sharing (SQSS) scheme based on Bell states [A. Yin et al., Mod. Phys. Lett. B. https://doi.org/10.1142/S0217984917501500 ]. This protocol was presumed that only the sender has the quantum power and all participants perform classical operations. However, we find this protocol is not that secure as it is expected. We can utilize the intercept-resend method to attack this scheme. Then, we give an improvement strategy based on semi-quantum key distribution, which ensures that the new scheme resists the attack we have proposed.

Scalable Quantum Secret Sharing Extended from Quantum Key Distribution

2007 ◽  
Vol 24 (5) ◽  
pp. 1147-1150 ◽  
Author(s):  
Liu Wei-Tao ◽  
Liang Lin-Mei ◽  
Li Cheng-Zu ◽  
Yuan Jian-Min
Keyword(s):  
Secret Sharing ◽  
Quantum Key Distribution ◽  
Quantum Secret Sharing ◽  
Key Distribution

New approach to quantum key distribution via quantum encryption

2009 ◽  
Vol 9 (9&10) ◽  
pp. 879-898
Author(s):  
A. Fahmi
Keyword(s):  
Secret Sharing ◽  
Quantum Key Distribution ◽  
Bell State ◽  
Quantum Secret Sharing ◽  
Key Distribution ◽  
Channel Noise ◽  
New Approach ◽  
Ghz States ◽  
Higher Dimensional ◽  
Special Strategy

Recently, Zhang, Li and Guo (ZLG) suggested a new approach to quantum key distribution by using a shared Bell state which acts as quantum key in order to encode and decode classical information. Subsequently, others extended ZLG protocol to d-dimensional systems and to quantum secret sharing based on reusable GHZ states. However, Gao et al. have shown that if Eve employs a special strategy to attack, these protocols become insecure. Afterwards, they repair ZLG protocol so that their eavesdropping strategy becomes inefficient. In this paper, we investigate the security of ZLG quantum key distribution protocol and show that it is not secure against Eve's attacks and with probability of one half she gets all of the keys without being detected by the two parties. In this eavesdropping strategy, Eve transforms the previously shared Bell state between Alice and Bob to two Bell states among herself and the parties. Moreover, we briefly show that ZLG's repairing by Gao et al's is not efficient against of our attack and Eve can choose an appropriate rotation angle and measurement bases which help her to do eavesdropping. Afterwards, we discuss generalization of ZLG protocol to d-dimensional systems and show that with probability 1/d, Eve gets all of keys. We show that quantum secret sharing based on reusable GHZ states is also not secure and with probability one half, Eve gets all of keys. We repair them by going to higher dimensional shared EPR or GHZ states. Finally, we compare ZLG protocol with ours and show that the ZLG protocol and its extensions are less robust against the channel noise with respect to ours.

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