Tag Archives: Data Diode

Secure Delivery of a Payload via a Protocol Break

21 Oct

A secure information exchange consists of two distinct elements: the information you need to convey – the payload, and the technical method used to carry the payload – the protocol. Attackers wishing to break into your network can exploit either of these: the protocol or the payload.

In this blog we briefly look at protecting protocol-based attacks. In a future blog we will look at content-based (payload) attacks.

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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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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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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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