Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
41-bilet
1. GOST 28147-89 - ma’lumotlarni shifrlashning Rossiya standarti algoritmini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=73, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={27,784,222,478,417,450,116,115,216,417,615,115,216}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=661, g=54, x=494, a=423, b={131,156,256,642,81,442,56,442,381,642,206,467,131,231,617,56,442,231,617}, M=?
Kafedra mudiri Jo'rayev G.U.