Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
42-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=223, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={612,74,581,545,255,265,36,265,786,331,826,503}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=263, g=94, x=254, a=62, b={258,192,126,245,34,192,113,245,205,34,245,60,100,152,192,231,192,60,100}, M=?
Kafedra mudiri Jo'rayev G.U.