Unidirectional networks, or data diodes, are used extensively in high-assurance security for purposes like these: https://www.opswat.com/blog/why-data-diodes-a

Unidirectional networks, or data diodes, are used extensively in high-assurance security for purposes like these: https://www.opswat.com/blog/why-data-diodes-are-essential-isolated-and-classified-networks https://www.opswat.com/blog/why-data-diodes-are-essential-is... Strongest designs are done with light such as fiber or infrared. A number of products were analyzed and pentested by evaluators and intelligence agencies with resulting EAL7+ certification, the highest. Link below lists some of the products. https://www.securitywizardry.com/index.php/products/boundary-guard/data-diodes.html https://www.securitywizardry.com/index.php/products/boundary... Owl's page has some more applications: https://www.owlcyberdefense.com/ https://www.owlcyberdefense.com/