Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
48-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=629, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={120,444,704,49,711,427,56,487,56,120,31,554}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=503, g=489, x=312, a=89, b={479,65,339,65,307,116,65,116,447,396,428,167,256,46,84,358,288,97,205,256,84,116,498,65,447,65}, M=?
Kafedra mudiri Jo'rayev G.U.