Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
49-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=761, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={335,444,164,569,711,554,213,444,164,711,461,164,711,206}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=673, g=507, x=319, a=621, b={116,255,246,439,587,623,80,578,71,605,282,439,264,605,412,605,62,605,596,71,623,412,605,62,605,596}, M=?
Kafedra mudiri Jo'rayev G.U.