Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
53-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=173, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={674,564,199,37,620,623,553,235,623,199,674,37,623,602}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=509, g=354, x=197, a=232, b={14,396,332,269,78,458,267,460,396,203,78,204,141,204}, M=?
Kafedra mudiri Jo'rayev G.U.