@Inproceedings{ Khalili17-ISIT,
  author = {M. R. Khalili Shoja and G. Amariucai and Z. Wang and S. Wei and J. Deng},
  title = {Asymptotic Converse Bound for Secret Key Capacity in Hidden Markov Model},
  booktitle = {Proc. of the IEEE International Symposium on
  Information Theory (ISIT'17)},
  month = {June 25-30},
  year = {2017},
  pages = {1968-1972},
  volume = {},
  address = {Aachen, Germany},
  doi = {10.1109/ISIT.2017.8006873} }