Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
17-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=631, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={397,81,296,515,491,660,254,115,524,491,88,115,524}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=389, g=248, x=226, a=35, b={43,163,119,163,84,201,321,277,356,163,160,239,201,163,160,280,43,163,277,163,160,280}, M=?
Kafedra mudiri Jo'rayev G.U.