Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
37-bilet
1. Kvadratik chegirma usuliga asoslangan BBS generatorini tushuntiring va misollar keltiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=307, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={254,154,677,154,594,147,154,147,711,14,115,592,115,154}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=257, g=71, x=80, a=154, b={58,181,61,181,183,54,177,57,49,181,54,177,55,183,184,50,50,181,189}, M=?
Kafedra mudiri Jo'rayev G.U.