Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
32-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=17, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={242,481,805,354,166,452,321,524,16,512,410,354,194,512,392,512,249,512,241,16,452,392,512,249,512,241}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=643, g=278, x=277, a=586, b={386,101,503,430,481,313,6,408,145,430,554,430,576,313,481,386,554}, M=?
Kafedra mudiri Jo'rayev G.U.