Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
21-bilet
1. O‘zDSt 1105:2009 - ma’lumotlarni shifrlashning O‘zbekiston standarti algoritmini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=691, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={17,148,269,302,514,310,285,302,341,310,702,775,567,135,531}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=911, g=813, x=104, a=769, b={786,198,218,394,786,198,218,590,688,786,884,345,394,737,737,198,120}, M=?
Kafedra mudiri Jo'rayev G.U.