Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
31-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=221, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={461,105,582,105,523,110,105,110,310,742,111,506,472,550,304,206,117,601,30,472,304,110,16,105,310,105}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=503, g=231, x=162, a=64, b={125,35,27,485,170,170,162,358,350,313,305,403,305,358,350,313,305,403,305,358,350}, M=?
Kafedra mudiri Jo'rayev G.U.