$password = Read-Host -Prompt 'Enter your password to encrypt' -AsSecureString
Then, you will need to dump the output of the secure string into an xml file where you powershell script will call at runtime and decrypt.
$password | Export-Clixml -Path 'C:\securepassword.xml'
You can see that the contents of the file it create, securepassword.xml, has your password in encrypted format.
Next, have you powershell call that file and decrypt it.
$password = Import-CliXml -Path 'c:\securepassword.xml'
$plain_password = [Runtime.InteropServices.Marshal]::PtrToStringAuto([Runtime.InteropServices.Marshal]::SecureStringToBSTR($password))
write-host $plain_password
One caveat is that you must run the Import-CliXml command as the same user you use to encrypt the password.
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