Need to encrypt a string and store it in aN XML File.

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From: Kevin Hodgson (kevin_at_caseware.com)
Date: 10/04/04 

Date: Mon, 4 Oct 2004 14:22:08 -0400

I store a users SMTP UserName and Password in a settings class, which is
serialized to an XML Settings File.

I need to encrypt the password string in some manner. Does anyone have any
ideas how to do that and still store it in the XML File?
I was thinking of putting the Encryption/Decryption code in the Get/Set
methods of the SMTPPassword Property.

Sample Code:

    Public Sub Persist()
        '// Save the Settings object to XML Files
        Dim settingsPath As String =
IO.Path.Combine(Application.UserAppDataPath, "settings.xml")
        Dim myXMLSerializer As Xml.Serialization.XmlSerializer
        Dim settingsFile As IO.StreamWriter

        '//Save the settings class
        myXMLSerializer = New
Xml.Serialization.XmlSerializer(GetType(Settings))
        settingsFile = New IO.StreamWriter(settingsPath)
        myXMLSerializer.Serialize(settingsFile, appSettings)
        settingsFile.Close()
    End Sub

<Serializable()> Public Class Settings
    Dim m_SMTPLoginName as String
    Dim m_SMTPPassword as String
    Public Property SMTPLoginName() as String
        Get
            Return m_SMTPLoginName
        End Get
        Set(ByVal Value As String)
            m_SMTPLoginName = Value
        End Set
    End Property
    Public Property SMTPPassword() as String
        Get
            Return m_SMTPPassword
        End Get
        Set(ByVal Value As String)
            m_SMTPPassword = Value
        End Set
    End Property
End Class

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