Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
6-bilet
1. Feystel tarmog‘ini tushuntiring (i-round uchun)
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=541, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={516,504,594,115,504,248,256,504,114,554,31,554,362,594,504,565,116,504}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=509, g=473, x=342, a=418, b={94,252,371,172,289,369,486,133,488,252,369,371,18,57,96,486,252,291}, M=?
Kafedra mudiri Jo'rayev G.U.