The Owl Secure Software Update Solution (SSUS) is a data diode based cybersecurity solution that follows the “Seven Steps to Effectively Defend Industrial Control Systems by providing a highly secure method to validate, scan, and transfer software patch and executable files into secured or isolated networks. SSUS individually validates executable and non-executable files against a manifest of pre-configured hash numbers provided by the software provider or vendor. Files that do not have a matching hash are quarantined.