Introduction:

In this article we are going to explain how to Encrypt and Decrypt website URL or Email Address in Asp.net with example.

Description:

Encrypt and decrypt are very important data in asp.net For security purpose, we are storing some valuable things in Encrypt format.

Let’s see an example:

using System;

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace TutorialsAsp.Net
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        public string Encrypt(string inputText)
        {
            string encryptionkey = "ACDS193BX628TD57";
            byte[] keybytes = Encoding.ASCII.GetBytes(encryptionkey.Length.ToString());
            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            byte[] plainText = Encoding.Unicode.GetBytes(inputText);
            PasswordDeriveBytes pwdbytes = new PasswordDeriveBytes(encryptionkey, keybytes);
            using (ICryptoTransform encryptrans = rijndaelCipher.CreateEncryptor(pwdbytes.GetBytes(32), pwdbytes.GetBytes(16)))
            {
                using (MemoryStream mstrm = new MemoryStream())
                {
                    using (CryptoStream cryptstm = new CryptoStream(mstrm, encryptrans, CryptoStreamMode.Write))
                    {
                        cryptstm.Write(plainText, 0, plainText.Length);
                        cryptstm.Close();
                        return Convert.ToBase64String(mstrm.ToArray());
                    }
                }
            }
        }
        public string Decrypt(string encryptText)
        {
            string encryptionkey = "ACDS193BX628TD57";
            byte[] keybytes = Encoding.ASCII.GetBytes(encryptionkey.Length.ToString());
            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            byte[] encryptedData = Convert.FromBase64String(encryptText.Replace(" ", "+"));
            PasswordDeriveBytes pwdbytes = new PasswordDeriveBytes(encryptionkey, keybytes);
            using (ICryptoTransform decryptrans = rijndaelCipher.CreateDecryptor(pwdbytes.GetBytes(32), pwdbytes.GetBytes(16)))
            {
                using (MemoryStream mstrm = new MemoryStream(encryptedData))
                {
                    using (CryptoStream cryptstm = new CryptoStream(mstrm, decryptrans, CryptoStreamMode.Read))
                    {
                        byte[] plainText = new byte[encryptedData.Length];
                        int decryptedCount = cryptstm.Read(plainText, 0, plainText.Length);
                        return Encoding.Unicode.GetString(plainText, 0, decryptedCount);
                    }
                }
            }
        }

        protected void btnEncrypt_Click(object sender, EventArgs e)
        {
            lblEncrypt.Text = Encrypt(txtEncrypt.Text);
        }

        protected void btnDecrypt_Click(object sender, EventArgs e)
        {
            lblDecrypt.Text = Decrypt(txtDecrypt.Text);
        }

    }
}


Output:

Encrypt and Decrypt Data with C#

 I hope this article will help to you after reading.


  Modified On Sep-07-2019 12:18:13 AM

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