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Diodes are Diodes, Guards are Guards

15 Sep

Over the last 3-5 years Data Diodes have grown in popularity as a solution for moving data between isolated networks. With this has come creative marketing to leverage the term ‘Diode’ for solutions that are anything but.

Let’s just take a few moments to revise some of the fundamental modes of secure information exchange.

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Diode Applications: Secure Printing

12 Nov

In this blog series, I have been exploring applications for Data Diodes.  This week, I look at the issue of printing between different networks.

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Diode Applications: Secure Network Monitoring

10 Oct

For the third article in the Data Diode blog series, I explore Audit and Monitoring between Domains.

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Diode Applications: Secure Windows Updates

27 Aug

In this blog series, I have been exploring applications for Data Diodes.  This week, I look at the issue of getting Windows Updates into a segregated network — securely.
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Nexor in Touch

27 Jun

An article about a Nexor solution deployment in the FCO Services has been published in the Microsoft Technology in the Public Sector Magazine – Touch.

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Diode Applications: Secure Remote Camera Control

13 Jun

In this blog series, I will explore applications for Data Diodes. In the first of the series, we’ll look at providing secure access to  remote CCTV cameras, in unsecured location.
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Yet Another Stuxnet Article

21 May

A lot has been written about Stuxnet, one of the big revelations was the malware had jumped an air-gap.  The on-going debate is whether air-gaps work, or would joining the networks in a controlled way REDUCE the vulnerability.

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The Need for Network Segregation in Critical Infrastructure Systems

16 Apr

A recent article in the NY Times claims:

The vast majority of targeted computer attacks now start with a malicious e-mail sent to a company employee. Now evidence suggests that the same technique could be used to attack watersheds, power grids, oil refineries and nuclear plants.

This cannot be allowed to happen, here I explore the issue in a little more detail.

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Air Gaps, Firewalls and Data Diodes in Industrial Control Systems

26 Mar

Nexor have just released a briefing paper Air-Gaps, Firewalls and Data Diodes in Industrial Control Systems looking the issues around segregating industrial control system networks. What works best: Air Gaps, Firewalls or Data Diodes?

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Can you trust a $1612 Data Diode?

12 Mar

The Data Diode technical model to achieve a one way network connection is relatively simple. However when you start to consider trust and assurance, it gets more complex.

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DIY Data Diode for $1612

7 Feb

Is it viable to build a Data Diode for $1612?

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Data Diode Technology Can Help Solve Complex Cyber Security Issues

29 Jan

Due to recent security incidents, there is now a significant debate with regard to what is the best way to protect Industrial Control Systems (ICS).

Generally, the debate focuses on whether networks should be isolated via an Air-Gap, or joined by well-configured Firewall(s) but the debate often misses a third option – Data Diodes.

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Overcoming Air Gap Security Failures

3 Jul

Air Gaps are not as secure as you might think.

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