Introducing a post-processing protocol for quantum key distribution (QKD) systems

Document Type : Original Article

Authors

1 Assistant Professor, Malek Ashtar University of Technology, Shahinshahr, Iran

2 PhD, Malek Ashtar University of Technology, Shahinshahr, Iran

Abstract

This paper introduces a post-processing protocol for quantum key distribution (QKD) systems based on the widely used two-dimensional standard BB84 setup. In writing the algorithms of this protocol, the optimal version of well-known codes and functions such as LDPC encoding and decoding codes, key derivation functions, PolyHash and Toeplitz hashing functions, and one-time-pad encoding systems have been used. This protocol is not limited to use in the two-dimensional BB84 scheme, and with a simple and minor change in its sifting algorithm, it can also be used to post-process various QKD protocols (including the two-state polarization and phase protocols (B92), the four-state protocols based on entangled states (BBM92), decoy state protocols, high-dimensional protocols, etc.).

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  • Receive Date: 17 November 2024
  • Revise Date: 13 February 2025
  • Accept Date: 13 March 2025
  • Publish Date: 21 April 2025