Security in cryptography
Cryptography play important role in Security.
Using Cryptography we can Encrypt and Decrypt the information in the Coded form.
How we Encrypt the File using DES (Data
Encryption standard) algorithm.
1.Open visual studio and create a project
2.Add the following assembly on the page
using
Microsoft.VisualBasic;
using
System;
using
System.Collections;
using
System.Collections.Generic;
using
System.Data;
using
System.Diagnostics;
using
System.Security;
using
System.Security.Cryptography;
using
System.Text;
using
System.IO;
3.Now write the Code in the
Page
public class Tester
{
public static void Main()
{
try
{
DESCryptoServiceProvider myDESProvider =
new
DESCryptoServiceProvider();
myDESProvider.Key = ASCIIEncoding.ASCII.GetBytes("12345678");
myDESProvider.IV = ASCIIEncoding.ASCII.GetBytes("12345678");
ICryptoTransform myICryptoTransform =
myDESProvider.CreateEncryptor(myDESProvider.Key, myDESProvider.IV);
FileStream ProcessFileStream =
new FileStream("test.txt",
FileMode.Open,
FileAccess.Read);
FileStream ResultFileStream =
new FileStream("testDes.txt",
FileMode.Create,
FileAccess.Write);
CryptoStream myCryptoStream =
new CryptoStream(ResultFileStream,
myICryptoTransform, CryptoStreamMode.Write);
byte[] bytearrayinput =
new byte[ProcessFileStream.Length];
ProcessFileStream.Read(bytearrayinput, 0, bytearrayinput.Length);
myCryptoStream.Write(bytearrayinput, 0, bytearrayinput.Length);
myCryptoStream.Close();
ProcessFileStream.Close();
ResultFileStream.Close();
}
catch (Exception
ex)
{
Console.WriteLine(ex.Message);
}
}
}
4.Now
create a text file in the folder D:\New Folder
(2)\ConsoleApplication4\ConsoleApplication4\bin\Debug (My text file path) with
some text which you want to encrypt .
Now start
debugging, you will see a testDes.txt folder automatically generated in the
folder that is encrypted folder.