Issue No. 69 is ready to be published

CONTENTS

THEORETICAL BACKGROUNDS OF APPLIED DISCRETE MATHEMATICS
Efimov D. B. Combinatorial aspects of the q-Hafnian ... 5
Kutsenko A. V. Characterization of some classes of isometric mappings that preserve self-duality of generalized bent function ... 18
Pankratova I. A., Sorokoumova A. D. On cryptanalytic invertibility of discrete functions ... 37
MATHEMATICAL METHODS OF CRYPTOGRAPHY
Denisov O. V., Andreev E. D., Bataev M. A. Characteristics of distinguishing attacks on 3 and 4 rounds of the Luby — Rackoff scheme in independent permutations model ... 55
Ioganson I. D., Davydov V. V., Dakuo J.-M. N., Khutsaeva A. F. Mental poker protocol based on the problem of finding isogenies between elliptic curves ... 68
Cheremushkin A. V. General scheme for a class of Diffie — Hellman type protocols ... 94
APPLIED GRAPH THEORY
Byzov V. A., Pushkarev I. A. Explicit construction of infinite families of strongly regular digraphs with parameters ((v+(2^(n+1)−4)t)2^(n−1), k+(2^n − 2)t, t, λ, t) ... 110
MATHEMATICAL BACKGROUNDS OF INFORMATICS AND PROGRAMMING
Ruzanova D. P., Rybalov A. N. On the generic complexity of graph 3-coloring problems ... 120

BRIEF INFORMATION ABOUT THE AUTHORS ... 128