This cannot work. SecureString is an object, while you get a string from PowerShell output.

You might be able to use the ProtectedData.Unprotect approach.

I cannot run powershell scripts on my machine, but maybe I could circumvent the problem by using powershell command line.
Here is what I tried:

but I get an error stating something like "SecurePassword incorrect argument" (sorry I had to translate the message into English). So, I even wonder if "SecurePassword" is supported at all in VBS.

A full VBS solution would be prefered but if I can find a workaround with a working version of the code above, I would be happy too!

Sorry, I should have pointed to the full page:
https://winscp.net/eng/docs/guide_protecting_credentials_for_automation

The page shows how to store encrypted passwords in xml and the use them as secure password e.g. in Powershell with
$sessionOptions.SecurePassword = ConvertTo-SecureString $config.Configuration.Password

I am bound to use VBS and would like to do something similar to avoid storing plain clear text password in a config file.

Hope this makes my point clearer.

Many thanks for your help.

That article shows several techniques. Do you have any particular one in mind?

You point to a footnote, which does not seem relevant to your question.

Hello,

I would like to protect credentials using encryption in a similar way to what is explained here:

https://winscp.net/eng/docs/guide_protecting_credentials_for_automation#fn2

... but for VBS.

Guidance would be very welcome.

Thanks.