How Our Products Work

Owl data diodes can perform a data transfer in three different scenarios:


Data diodes enable a secured network to send data one-way out to external users and systems that need it. The send side emits light (aka data) to a photo receiver on the destination side. It’s like a one-way valve for data—on tap whenever you need it, with no entry back in.

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Data diodes can also be used to transfer data, such as software updates and executables one-way into a secured network. Optional filtering and anti-virus keeps dangerous files from entering and hackers have no visibility into the network.

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Some systems cannot operate one-way, so they require a two-way solution. For these use cases, Owl has unique bidirectional data diode solutions that operate on two parallel one-way paths. Get all the security advantages of data diodes with the flexibility of a two-way solution.

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We’re real people behind these machines

With a culture of innovation and a goal of excellence in everything we do, the Owl team are leaders in our industry and our community. We take pride in the creation of Owl’s market-first products and technology, but we don’t succeed unless your organization is secure and satisfied.

Expertise You Can Count on

With twenty years of experience protecting networks and digital assets across government, industrial, and commercial organizations, the Owl team is seasoned and ready to help you tackle your toughest cybersecurity challenges.

The Market Leader

Since its founding, Owl has consistently led the world in data diode technology. Our solutions feature unmatched capabilities, throughput, value, and ease of use—no competing solution even comes close.

Even the Big Guys Trust Data Diodes.

Some of the world’s largest industrial and commercial organizations—not to mention the U.S. government—trust Owl with the defense of their most sensitive digital assets.

Homeland Security
Department of the Navy
Department of the Air Force
Department of the Army
Department of State
Department of Energy
US Department of Homeland Security
National Security Agency - US
Department of Justice - FBI
US Nuclear Regulatory Commission
Don't Just Take Our Word For It.

Owl technology is certified and validated by industry specialists and regulatory bodies recognized all over the world.

Common Criteria EAL
Safety Act
ISO Certification
Warning: Humble Brag Ahead.

We feel honored that Owl is consistently recognized for excellence in the industry among peers whom we both respect and applaud.

President's E Award
Cybersecurity Excellence Award-Gold
Cybersecurity Excellence Award-Bronze
Network Products Guide

News & Knowledge

Owl Blog

January 28, 2020
Introducing SELint - An SELinux Policy Analysis Tool
As part of our ongoing leadership in the SELinux community, Tresys – now Owl Cyber Defense, as the companies have recently merged – has developed SELint, a free tool designed to perform sta...
December 04, 2019
Windows 7 End of Life Puts Hospitals in a Pickle
Microsoft is ending all support for Windows 7 on January 14th, 2020 - less than 3 months away (as of this writing)! After that time, there will no longer be any updates (including security patc...
November 21, 2019
Total Geekery: Data Diode Bioreactor Demo
This post will be on the light side, describing a demo I had fun making and about which my co-workers are tired of hearing me speak. Nonetheless, despite the geekiness of the demo, it was not a...
October 30, 2019
How Will You Securely Expand Your PI System to Include Contract Manufacturers?
So you want to optimize your manufacturing operations. The competitive landscape virtually demands it, driving efficiency into every facet of every process across your organization and beyond, ...
Owl Cyber Defense & Tresys Technology Announce Merger
January 06, 2020
Owl Cyber Defense (“Owl”) and Tresys Technology (“Tresys”) are excited to jointly announce that the two companies are merging. Integration of the Owl Danbury, CT office with the Tresys Columbia, MD off...
Owl Cyber Defense Announces the Official Release of DiOTa
August 14, 2019
Revolutionary New Data Diode Designed for the IIoT Now Available Danbury, CT August 14th, 2019 – Owl Cyber Defense Solutions, LLC (“Owl”), the global market leader in data diode network cybersecurity so...
Owl Cyber Defense Appoints Brian Romansky as Chief Technology Officer to Lead Advanced Technology Development
July 16, 2019
Danbury, CT July 16th, 2019 – Owl Cyber Defense Solutions, LLC (“Owl”), the global market leader in data diode network cybersecurity solutions, announced today the appointment of Brian Romansky as Chief ...
#Infosec19: Mitigating Risks and Managing Third Party Threats
June 06, 2019
Speaking at Infosecurity Europe 2019 on 'Effective Steps to Reduce Third Party Risk,' Scott W. Coleman, director of product management at Owl Cyber Defense, said that the average number of connections to a f...
Owl Cyber Defense Wins President’s “E” Award for Excellence in U.S. Exports
May 23, 2019
Data Diode Cybersecurity Leader Recognized for Sustained Growth in International Business Danbury, CT -  May 23, 2019 - Owl Cyber Defense Solutions, LLC (“Owl”), the global market leader in data diode ...