TY - JOUR AU - G. I. Shushuev TI - Optimal linear approximations for Feistel networks. Estimation for the resistance of the cipher SMS4 to linear cryptanalysis JO - Prikladnaya Diskretnaya Matematika. Supplement PY - 2012 SP - 58 EP - 60 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PDMA_2012_5_a30/ LA - ru ID - PDMA_2012_5_a30 ER -