@article{PDM_2009_11_a4,
     author = {A. V. Cheremushkin},
     title = {Cryptographic protocols},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {115--150},
     year = {2009},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2009_11_a4/}
}