Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
38-bilet
1. Feystel tarmog‘ini tushuntiring (i-round uchun)
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=263, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={801,592,417,455,749,749,658,391,25,668,154,620,154,391,25,668,154,620,154,391,25}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=853, g=349, x=607, a=75, b={706,600,706,79,19,706,245,185,351,185,600,789,683,79,517,374,245,162,185,683,600}, M=?
Kafedra mudiri Jo'rayev G.U.