Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
28-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=421, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={724,171,74,255,255,771,155,441,171,93,771,159,771,313,313,376,781,171,155,155,171,32}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=947, g=773, x=902, a=607, b={373,516,847,89,705,658,516,657,516,231,137,278,421,705,231,705,468,705}, M=?
Kafedra mudiri Jo'rayev G.U.