Page 129 - Cyber Defense eMagazine October 2023

sorts of assets, because their collapse could cost the country a lot. Well, it appears that we would choose
the strategically important business to deal with. For example, we could try to deal with some trading
organizations, but to be honest – we would get no information about their vitally significant web servers
using the Censys as our searching tool. Next – in a Figure 1 – we would show a typical business
illustration being accessible through the web.

Figure 1. The business with the rising indications

The first thing we would do in this case would be searching the web using a standard Google crawler.
We would select the keywords being ‘PTT Net’ and get offered many results. In our case, we would
highlight only one of them getting closely correlated with our searching criteria. Through our research –
we would think deeply about the differences between the Google and Censys crawlers and we would
come to a conclusion that Google would offer us the web content being visible to a browser, while Censys
would go deeper and offer us infrastructure that would include the web servers, devices being connected
to the internet and much more. On the other hand, the Google got suitable for quite surface searches
offering as the results which got some sort of the web interface such as websites, webpages and web
presentations. In addition, the Censys is so serious product giving us the IP addresses of devices being
the part of the web. Sometimes it’s possible to get some webpage as a result of the Censys search, but
in that case – you should get aware that such a result must be correlated with some of the IoT assets. In
Figure 2, we would illustrate the result of the Google search for a ‘PTT Net’ keyword.

Figure 2. The Google search for a criterion ‘PTT Net’

Cyber Defense eMagazine – October 2023 Edition 129
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