Check the incognito browser history anyway

The theory says that when you use the privacy mode of your browser, no one can check which sites you visited… After all, no browsing history is kept by your browser. At least, that’s what Google Chrome, Firefox, Edge or any other browser wants you to believe. We therefore use it to buy gifts for our loved ones (so they don’t know what we bought), to visit sites that literally carry not much clothing or, as we authors tend to do, to investigate sensitive items for our books. Like murders. Escape from prisons, etc…

The main idea behind this privacy mode is to keep items… Private. So, no cached items, no cookies (after the session is closed) and no list of URLs you visited.

Unearth the secrets

You might therefore expect that these kind of visits remain secret – at least for those using the same computer as you do. Your Internet Provider knows which sites you visite, of course, even in Private Mode, because… Well… They don’t care about your browser settings. Also, there are laws that make sure they keep such travels acros the internet.

But apparently, it’s also possible for someone working on your computer to find these secrets and nevertheless read those URLs you visited.

Every site you visit is kept (temporarily) in the DNS Cache memory. So, as long as you keep your computer running, the information of the sites you visited, is available for everyone. Data is only removed when you switch off the computer.

Read those URLs

So, you want to read those darned URLs?

  1. Press the Windows-key + R.
  2. The Run-window opens. Type cmd and press Enter.
  3. The Command Prompt window opens.
  4. Type ipconfig /displaydns + Enter.
  5. You immediately get a list of all visited URLs – including those you (or someone else) visited in privacy mode. This data is, by definition, also stored in the DNS cache of your system.
  6. If you have a very long list, you won’t be able to scroll through all of these. Luckily you can save them to a text-file: Type ipconfig /displaydns > dns.txt.
  7. You find the dns.txt file in the same map as the one where you entered the command. So, by default, that is c:User (where the user has the same name as the map you opened in the dos-window). You can now open the file in Notepad or Word (if you have that last one).
  8. The DNS cache ONLY saves those addresses visited during this session. There is also no way to see who visited which site. That’s something you can try to figure out.

How to stop this from happening?

That’s simple. Hoe voorkom je dat iemand die DNS cache uitleest?
In dat geval doe je hetzelfde als hierboven. Alleen type je dan ipconfig /flushdns.

Je kan het jezelf zelfs nog gemakkelijker maken, zoals we op internet ontdekten.

  1. Press the Windows-key + R.
  2. The Run-window opens. Type cmd and press Enter.
  3. The Command Prompt window opens.
  4. Type ipconfig /flushdns + Enter
  5. This way you delete everything (in your DNS cache) and you don’t have to restart your system.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s