Comment on: "secure direct communication based on ping-pong protocol" [Quantum Inf. Process. 8, 347 (2009)]

  • Authors:

  • Mosayeb Naseri

  • Affiliations:

  • Islamic Azad University, Kermanshah, Iran

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2010

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Abstract

The crucial issue of quantum communication protocol is its security. In this paper, the security of a secure direct communication based on ping-pong protocol [Chamoli A, Bhandari CM, Quantum Inf Process 8, 347 (2009)] is analyzed. It is shown that in this protocol any dishonest party can obtain all the other one's secret message with zero risk of being detected by using a special type of attack, i.e., using fake entangled particles (FEP attack). Finally, a simple improvement to resist this attack is proposed.