Amaliy kriptografiya fanidan 1-amaliy mashg’ulot Klassik shifrlash algoritmlarini Java dasturlash tilidan foydalanib yaratilgan dasturlari: Sezar dastur kodi

Amaliy kriptografiya fanidan 1-amaliy mashg’ulot
Klassik shifrlash algoritmlarini Java dasturlash tilidan foydalanib yaratilgan dasturlari:
Sezar dastur kodi:
package Entity;

import java.util.Locale;

import java.util.Scanner;

public class Sezar {

public static final String ALIFBO= "abcdefghijklmnopqrstuvwxyz";
public static void main(String[] args) {

Scanner str=new Scanner(System.in);

Scanner num=new Scanner(System.in);

String ochiqMatn;

int kalit;
String shifrMatn="";

System.out.print("Ochiq matnni kiriting: ");

ochiqMatn=str.nextLine();

System.out.print("Kalit uzunligini kiriting: ");

kalit=num.nextInt();

for (int i = 0; i < ochiqMatn.length(); i++) {

ochiqMatn=ochiqMatn.toLowerCase();

int i1 = ALIFBO.indexOf(ochiqMatn.charAt(i));

int i2 = (kalit + i1)%26;

shifrMatn+=ALIFBO.charAt(i2);

}

System.out.println();

System.out.println("shifrMatn = " + shifrMatn);

}
}

Dastur natijasi:

Vernam dastur kodi:
package Entity;

import java.util.Locale;

import java.util.Scanner;

public class Vernam {

public static void main(String[] args) {
String ochiqMatn, kalit;
String shifrmatn = "";

Scanner scanner=new Scanner(System.in);

System.out.print("ochiq matnni kiriting: ");
ochiqMatn=scanner.nextLine();

System.out.print("kalitni kiriting: ");

kalit=scanner.nextLine();

ochiqMatn=ochiqMatn.toUpperCase();

kalit=kalit.toUpperCase();

int shifr[] = new int[kalit.length()];

for (int i = 0; i < kalit.length(); i++) {
shifr[i] = ochiqMatn.charAt(i) - 'A'
+ kalit.charAt(i)
- 'A';
}

for (int i = 0; i < kalit.length(); i++) {

if (shifr[i] > 25) {
shifr[i] = shifr[i] - 26;
}
}

for (int i = 0; i < kalit.length(); i++) {

int x = shifr[i] + 'A';
shifrmatn += (char)x;
}
System.out.println("shifrMatn= "+ shifrmatn);
}
}


Dastur natijasi:


Venjiner usuli:
def Tekshirish(string, key):
key = list(key)
if len(string) == len(key):
return (key)
else:
for i in range(len(string) - len(key)):
key.append(key[i % len(key)])
return ("".join(key))
def Shifrlash(string, key):
Shifr = []
for i in range(len(string)):
x = (ord(string[i]) + ord(key[i])) % 26
x += ord('A')
Shifr.append(chr(x))
return ("".join(Shifr))
if __name__ == "__main__":
string = input("Enter the message: ")
keyword = input("Enter the keyword: ")
key = Tekshirish(string, keyword)
Shifr = Shifrlash(string, key)
print("SHifrlangan matn:", Shifr)

Dastur natijasi: