Knowledge of error-correcting protocol helps in individual eavesdropping
D. B. Horoshko · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2007
The quantum key distribution protocol ΒΒ84 combined with the repetition protocol for error correction are analyzed from the viewpoint of security against individual eavesdropping empowered by quantum memory. We show that a mere knowledge of the error correction protocol changes the optimal attack and provides the eavesdropper with additional information about the generated key.