Privacy

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A place to discuss privacy and freedom in the digital world.

Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.

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Privacy concerns with DHCP (DHCP fingerprinting) (lemmy.zip)

submitted 4 months ago* (last edited 4 months ago) by possiblylinux127@lemmy.zip to c/privacy@lemmy.ml

44 comments fedilink hide all child comments

So many people here will go though great lengths to protect themselves from fingerprinting and snooping. However, one thing tends to get overlooked is DHCP and other layer 3 holes. When your device requests an IP it sends over a significant amount of data. DHCP fingerprinting is very similar to browser fingerprinting but unlike the browser there does not seem to be a lot of resources to defend against it. You would need to make changes to the underlying OS components to spoof it.

What are everyone's thoughts on this? Did we miss the obvious?

https://www.arubanetworks.com/vrd/AOSDHCPFPAppNote/wwhelp/wwhimpl/common/html/wwhelp.htm#href=Chap2.html&single=true

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[–] delirious_owl 2 points 4 months ago (1 children)

Android? How do I force it to use a random Mac every time? It pins a random Mac to a given network, which greatly reduces privacy between sessions.

[–] jet@hackertalks.com 1 points 4 months ago* (last edited 4 months ago) (1 children)

Developer settings for newer androids.

GOS has it on by default https://grapheneos.org/features#wifi-privacy

[–] delirious_owl 1 points 4 months ago (1 children)

How do I install this on non-Graphene OS?

[–] jet@hackertalks.com 1 points 4 months ago* (last edited 4 months ago) (1 children)

Developer settings

https://source.android.com/docs/core/connect/wifi-mac-randomization-behavior?hl=zh-cn

[–] delirious_owl 2 points 4 months ago (1 children)

Eh, I tried it. It doesn't work. Even the option says that it "may" change the mac on reconnect.

[–] jet@hackertalks.com 1 points 4 months ago (1 children)

What android are you running?

[–] delirious_owl 1 points 4 months ago