Security of Plug-and-Play QKD Arrangements with Finite Resources

Abstract

The security of a passive plug-and-play QKD arrangement in the case of finite (resources) key lengths is analysed. It is assumed that the eavesdropper has full access to the channel so an unknown and untrusted source is assumed. To take into account the security of the BB84 protocol under collective attacks within the framework of quantum adversaries, a full treatment provides the well-known equations for the secure key rate. A numerical simulation keeping a minimum number of initial parameters constant as the total error sought and the number of pulses is carried out. The remaining parameters are optimized to produce the maximum secure key rate. Two main strategies are addressed: with and without two-decoy-states including the optimization of signal to decoy relationship.

References in corpus (9)

• Simple and efficient quantum key distribution with parametric down-conversion
• Squashing Models for Optical Measurements in Quantum Communication
• Quantum key distribution with an unknown and untrusted source
• General theory of decoy-state quantum cryptography with source errors
• Security proof for QKD systems with threshold detectors
• Experimental Decoy State Quantum Key Distribution with Unconditional Security Incorporating Finite Statistics
• Efficient quantum key distribution with practical sources and detectors
• Min-entropy and quantum key distribution: non-zero key rates for "small" numbers of signals
• Complementarity, distillable secret key, and distillable entanglement