126 research outputs found
Improving the security of multiparty quantum secret splitting and quantum state sharing
A protocol for multiparty quantum secret splitting (MQSS) with an ordered
Einstein-Podolsky-Rosen (EPR) pairs and Bell state measurements is recently
proposed by Deng {\rm et al.} [Phys. Lett. A 354(2006)190]. We analyzed the
security of the protocol and found that this protocol is secure for any other
eavesdropper except for the agent Bob who adopts intercept-and-resend attack.
Bob can obtain all the information of Alice's alone without being found. We
also propose an improved version of the MQSS protocol.Comment: To appear in Phys. Lett.
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