Basic Encryption/Decryption (C#)

This example shows how you can use C# to encrypt and decrypt strings using a salt key to protect the data.
This type of encryption is called symmetric-key encryption, which means that the string can only be decrypted if the other party has the correct key.

[code lang=”csharp”]
using System;
using System.Security.Cryptography;
using System.Text;

public static class Encryption
{
public static string Encrypt(string input, string key)
{
byte[] inputArray = UTF8Encoding.UTF8.GetBytes(input);
TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
tripleDES.Mode = CipherMode.ECB;
tripleDES.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = tripleDES.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
tripleDES.Clear();
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}

public static string Decrypt(string input, string key)
{
byte[] inputArray = Convert.FromBase64String(input);
TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider();
tripleDES.Key = UTF8Encoding.UTF8.GetBytes(key);
tripleDES.Mode = CipherMode.ECB;
tripleDES.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = tripleDES.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);
tripleDES.Clear();
return UTF8Encoding.UTF8.GetString(resultArray);
}
}
[/code]