Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
10-bilet
1. O‘zDSt 1105:2009 - ma’lumotlarni shifrlashning O‘zbekiston standarti algoritmini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=499, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={15,660,252,88,182,182,88,537,73,524,73,378}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=587, g=427, x=422, a=440, b={282,131,81,299,64,64,14,416,366,47,584,198,584,416,366,47,584,198,584,416,366,81,14}, M=?
Kafedra mudiri Jo'rayev G.U.