Enkryptere en streng

VB.NET krypterings snippets:

Imports System
Imports System.Text
Imports System.Security.Cryptography

Public Class MainClass
    Private Shared utf As Encoding = New UTF8Encoding()
    Private Shared aes As Rijndael = New RijndaelManaged()
    Private Shared iv As Byte() = {1, 2, 3, 4, 5, 6, _
        7, 8, 9, 10, 11, 12, _
        13, 14, 15, 16}
    Public Shared Function Encrypt(plain As String, key As String) As String
        Dim aesenc As ICryptoTransform = aes.CreateEncryptor(utf.GetBytes(key), iv)
        Return Convert.ToBase64String(aesenc.TransformFinalBlock(utf.GetBytes(plain), 0, utf.GetByteCount(plain)))
    End Function
    Public Shared Function Decrypt(cipher As String, key As String) As String
        Dim aesdec As ICryptoTransform = aes.CreateDecryptor(utf.GetBytes(key), iv)
        Dim b As Byte() = Convert.FromBase64String(cipher)
        Return utf.GetString(aesdec.TransformFinalBlock(b, 0, b.Length))
    End Function
    Public Shared Sub Main(args As String())
        Console.WriteLine(Encrypt("Dette er en test !", "hemmeligabcdefgh12345678"))
        Console.WriteLine(Decrypt(Encrypt("Dette er en test !", "hemmeligabcdefgh12345678"), "hemmeligabcdefgh12345678"))
    End Sub
End Class

Ok, studerer lige koden nærmere inde i visual basic express :).

OK?