Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "EncryptDecrypt" and then click OK
Step 2: Design your form as below

Step 3: Add code to handle your form
using System;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;
namespace EncryptDecrypt
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string hash = "f0xle@rn";//Create a hash key
private void btnEncrypt_Click(object sender, EventArgs e)
{
byte[] data = UTF8Encoding.UTF8.GetBytes(txtValue.Text);
using (MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider())
{
byte[] keys = md5.ComputeHash(UTF8Encoding.UTF8.GetBytes(hash));//Get hash key
//Encrypt data by hash key
using (TripleDESCryptoServiceProvider tripDes = new TripleDESCryptoServiceProvider() { Key = keys, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 })
{
ICryptoTransform transform = tripDes.CreateEncryptor();
byte[] results = transform.TransformFinalBlock(data, 0, data.Length);
txtEncrypt.Text = Convert.ToBase64String(results, 0, results.Length);
}
}
}
private void btnDecrypt_Click(object sender, EventArgs e)
{
//Convert a string to byte array
byte[] data = Convert.FromBase64String(txtEncrypt.Text);
using (MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider())
{
byte[] keys = md5.ComputeHash(UTF8Encoding.UTF8.GetBytes(hash));//Get hash key
//Decrypt data by hash key
using (TripleDESCryptoServiceProvider tripDes = new TripleDESCryptoServiceProvider() { Key = keys, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 })
{
ICryptoTransform transform = tripDes.CreateDecryptor();
byte[] results = transform.TransformFinalBlock(data, 0, data.Length);
txtDecrypt.Text = UTF8Encoding.UTF8.GetString(results);
}
}
}
}
}
TripleDES uses three successive iterations of the DES algorithm. It can use either two or three 56-bit keys.
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