Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
5-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=637, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={26,660,147,60,387,660,710,60,588,387,60,437,669,93,660,781,660,437,669}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=631, g=625, x=65, a=25, b={432,242,235,364,310,622,500,364,303,242,310,242,235,432,303,500,45,242,235,432}, M=?
Kafedra mudiri Jo'rayev G.U.