Gilbert Sandford Vernam ciphertext in Java

Gilbert Sandford Vernam ciphertext in Java is implemented as:

Download Its Perfect Copy in .txt Format

Instruction to run the below program in windows OS:

1.save the program as   .java in bin folder of jdk.
2.compile the program using ” javac “in cmd prompt
3.run the file using java command.

INPUT is:   .java file :

SOURCE CODE: 

	import java.io.*;
	import java.math.*;
	class vernam
	{
	public static void main(String args[]) throws IOException
	{
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
	System.out.println("Enter the string");
	String st = br.readLine();
	System.out.println("enter the padding code");
	int pd[]=new int[7];
	int j=0,i=0;
	for(i=0;i<7;i++)
	pd[i]=Integer.parseInt(br.readLine());
	char ch[]=new char[st.length()];
	ch=st.toCharArray();
	int num;
	int send[][]=new int[st.length()][7];
	int receive[][]=new int[st.length()][7];
	int con[]=new int[7];
	System.out.println("Send code:");
	for(i=0;i<st.length();i++)
	{
	j=6;
	while((int)(ch[i])!=0)
	{
	con[j]=(int)(ch[i])%2;
	ch[i]=(char)((int)(ch[i])/2);
	send[i][j]=con[j]^pd[j];
	System.out.print(send[i][j]);
	j--;
	}
	System.out.println();
	}
	System.out.println("Received code:");
	for(i=0;i<st.length();i++)
	{
	j=6;
	while(j>-1)
	{
	receive[i][j]=send[i][j]^pd[j];
	System.out.print(receive[i][j]);
	j--;
	}
	System.out.println();
	}
	int sum;
	System.out.println("Original data:");
	for(i=0;i<st.length();i++)
	{
	sum=0;
	j=0;
	for(int k=6;k>=0;k--)
	{
	sum+=Math.pow(2,k)*receive[i][j];
	j++;
	}
	System.out.print((char)(sum));
	}
	}
	}
	/*OUTPUT:
	C:\jdk1.3\bin>javac vernam.java
	C:\jdk1.3\bin>java vernam
	Enter the string
	sharvari
	enter the padding code
	1111111
	Send code:
	0011000
	1110100
	0111100
	1011000
	1001000
	0111100
	1011000
	0110100
	Received code:
	1100111
	0001011
	1000011
	0100111
	0110111
	1000011
	0100111
	1001011
	Original data:
	sharvari*/

view raw vernam.java hosted with ❤ by GitHub

/*Aim:To implement vernam cipher*/

import java.io.*;

import java.math.*;

class vernam

{

public static void main(String args[]) throws IOException

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println(“Enter the string”);

String st = br.readLine();

System.out.println(“enter the padding code”);

int pd[]=new int[7];

int j=0,i=0;

for(i=0;i<7;i++)

pd[i]=Integer.parseInt(br.readLine());

char ch[]=new char[st.length()];

ch=st.toCharArray();

int num;

int send[][]=new int[st.length()][7];

int receive[][]=new int[st.length()][7];

int con[]=new int[7];

System.out.println(“Send code:”);

for(i=0;i

{

j=6;

while((int)(ch[i])!=0)

{

con[j]=(int)(ch[i])%2;

ch[i]=(char)((int)(ch[i])/2);

send[i][j]=con[j]^pd[j];

System.out.print(send[i][j]);

j–;

}

System.out.println();

}

System.out.println(“Received code:”);

for(i=0;i

{

j=6;

while(j>-1)

{

receive[i][j]=send[i][j]^pd[j];

System.out.print(receive[i][j]);

j–;

}

System.out.println();

}

int sum;

System.out.println(“Original data:”);

for(i=0;i

{

sum=0;

j=0;

for(int k=6;k>=0;k–)

{

sum+=Math.pow(2,k)*receive[i][j];

j++;

}

System.out.print((char)(sum));

}

}

}

/*OUTPUT:

C:\jdk1.3\bin>javac vernam.java

C:\jdk1.3\bin>java vernam

Enter the string

sharvari

enter the padding code

1111111

Send code:

0011000

1110100

0111100

1011000

1001000

0111100

1011000

0110100

Received code:

1100111

0001011

1000011

0100111

0110111

1000011

0100111

1001011

Original data:

sharvari*/