Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
52-bilet
1. GOST 28147-89 - ma’lumotlarni shifrlashning Rossiya standarti algoritmini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=779, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={741,206,148,760,506,48,676,512,206,103,506,302,134,103}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=641, g=361, x=624, a=144, b={534,238,584,436,41,41,387,287,633,139,485,435,485,287,633,139,485,435,485,287,633}, M=?
Kafedra mudiri Jo'rayev G.U.