Use RSA to crypt and decrypt : RSA « Security « VB.Net Tutorial

1. VB.Net Tutorial
2. Security
3. RSA

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


Public Class Tester
    Public Shared Sub Main

        Dim myRSAProvide As New RSACryptoServiceProvider()

        Dim strCrypt As String
        Dim strResult As String
        Dim bteCrypt() As Byte
        Dim bteResult() As Byte
        Try
            strCrypt = "12345678"
            bteCrypt = Encoding.ASCII.GetBytes(strCrypt)
            bteResult = myRSAProvide.Encrypt(bteCrypt, False)
            Console.WriteLine(Encoding.ASCII.GetString(bteResult))

        Catch ex As CryptographicException
            Console.WriteLine(ex.Message)
        End Try

        Dim strResault As String
        Dim bteDecrypt() As Byte
        Try
            bteDecrypt = myRSAProvide.Decrypt(bteResult, False)
            strResault = Encoding.ASCII.GetString(bteDecrypt)
            Console.WriteLine(strResault)
        Catch ex As CryptographicException
            Console.WriteLine(ex.Message)
        End Try

    End Sub
End Class