Establishing a script signing environment
You can often find that it is essential to know if an application, or a PowerShell script, has been modified since it was released. You can use Windows Authenticode Digital Signatures for this purpose.
Authenticode is a Microsoft code-signing technology that identifies the publisher of Authenticode-signed software. Authenticode also verifies that the software has not been tampered with since it was signed and published.
You can also use Authenticode to digitally sign your script using a PowerShell command. You can then ensure PowerShell only runs digitally signed scripts by setting an execution policy of AllSigned or RemoteSigned.
After you sign a PowerShell script, you can set PowerShell's execution policy to force PowerShell to test the script to ensure the digital signature is still valid and only run scripts that succeed. You can set PowerShell to do this either for all scripts (you set the execution policy to AllSigned) or only for scripts...
