Advantages of high-speed technique for quantum key distribution; reply   to quant-ph/0407050
  We respond to a comment on our high-speed technique for the implementation of free-space quantum key distribution (QKD). The model used in the comment assigns inappropriately high link losses to the technique in question. We show that the use of reasonable loss parameters in the model invalidates the comment's main conclusion and highlights the benefits of increased transmission rates. 
J. C. Bienfang, Charles W. Clark, Carl J. Williams, E. W. Hagley,   Jesse Wen