Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
23-bilet
1. Kalitlarni almashish Diffi-Xellman algoritmini tushuntiring va misollar keltiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=245, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={771,619,416,378,391,210,378,273,85,36,553,767,767,131}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=523, g=405, x=113, a=110, b={235,3,117,25,36,165,489,257,3,106,397,165,235,165,397,165,125}, M=?
Kafedra mudiri Jo'rayev G.U.