A comprehensive study of frequency, interference, and training of multiple graphical passwords. Everitt, K., Bragin, T., Fogarty, J., & Kohno, T. In Jr., D. R. O., Arthur, R. B., Hinckley, K., Morris, M. R., Hudson, S. E., & Greenberg, S., editors, Proceedings of the 27th International Conference on Human Factors in Computing Systems, CHI 2009, Boston, MA, USA, April 4-9, 2009, pages 889–898, 2009. ACM.
A comprehensive study of frequency, interference, and training of multiple graphical passwords [link]Paper  doi  bibtex   
@inproceedings{DBLP:conf/chi/EverittBFK09,
  author    = {Katherine Everitt and
               Tanya Bragin and
               James Fogarty and
               Tadayoshi Kohno},
  editor    = {Dan R. Olsen Jr. and
               Richard B. Arthur and
               Ken Hinckley and
               Meredith Ringel Morris and
               Scott E. Hudson and
               Saul Greenberg},
  title     = {A comprehensive study of frequency, interference, and training of
               multiple graphical passwords},
  booktitle = {Proceedings of the 27th International Conference on Human Factors
               in Computing Systems, {CHI} 2009, Boston, MA, USA, April 4-9, 2009},
  pages     = {889--898},
  publisher = {{ACM}},
  year      = {2009},
  url       = {https://doi.org/10.1145/1518701.1518837},
  doi       = {10.1145/1518701.1518837},
  timestamp = {Tue, 06 Nov 2018 00:00:00 +0100},
  biburl    = {https://dblp.org/rec/conf/chi/EverittBFK09.bib},
  bibsource = {dblp computer science bibliography, https://dblp.org}
}

Downloads: 0