Password encryption

[gugi]

My english is bad but I'll try to explain what the problem is.

In c:\Windows\Panther\unattend\unattend.xml file, domain account password is in plain text:

<component name="Microsoft-Windows-UnattendedJoin" language="neutral" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<Identification>

<Credentials>

<Username>testuser</Username>

<Domain>domain</Domain>

<Password>testpassword</Password>

</Credentials>

<MachineObjectOU>OU=Test,DC=domain,DC=local</MachineObjectOU>

<JoinDomain>domain.local</JoinDomain>

</Identification>

</component>

Above is part of unattend.xml file in c:\windows\panther\unattend folder in client machine.

This account and password are set within task sequence Apply Netwok Setting - Join a domain , as part of the operating system deployment . (Picture in attach)

How to encrypt that password so it is not visible as plain text?

Thanks in advance