While Air-Gaps are a good conceptual solution, in practice beyond Schneier’s single PC example, they are very hard to achieve. There is nearly always a backdoor to be found somewhere that an attacker can exploit.
Continue reading “More on Air Gaps” →
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.
Continue reading “Diodes are Diodes, Guards are Guards” →
After nearly two years of planning, the new UK Government Security Classification system comes into operation this month. This will probably be accompanied by some articles from the doomsday brigade suggesting forecasting chaos and uncertainty; there are undoubtedly rough edges, but it’s important not to lose sight of the bigger cultural change at play…
Continue reading “UK Government Security Classification Scheme” →
Subtitle: Countering Cyber Threat through Organizational Learning and Training
Author: Peter Trim and David Upton
Continue reading “Book Review: Cyber Security Culture” →
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.
Continue reading “Yet Another Stuxnet Article” →
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.
Continue reading “The Need for Network Segregation in Critical Infrastructure Systems” →
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?
Continue reading “Air Gaps, Firewalls and Data Diodes in Industrial Control Systems” →
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.
Continue reading “Data Diode Technology Can Help Solve Complex Cyber Security Issues” →
This is an insightful debate in the Economist, the full title being
This house believes that a hyper-connected world is more rather than less secure.
Sadly I missed the online comment period, so was not able to offer my thoughts in the debate itself. I would have voted less secure.
Continue reading “Economist Debate: “…a hyperconnected world is more rather than less secure.”” →