Doxxing Safety Pt I: Prevention and Footprint Management

Doxxing is the deliberate disclosure of personal information in order to bully, harass, intimidate, or instigate a chain of harms against someone. It's a tricky thing to protect against when the jerk doing it is often able to use legal and accessible means to do so. The odds are stacked against everyday internet folk when there's little to no comprehensive data privacy legislation keeping us safe. The responsibility is on each of us to protect ourselves, but the good news is that there's a lot you can do to reduce your digital footprint and take control of your data.

This post is part one of a two-part series discussing safety and response to doxxing. This first part focuses on prevention and ways to reduce your overall footprint. The second focuses on incident response, as in, steps to take if you're in the midst of being doxxed. There will be some crossover and redundancy between these two posts, so it's worth reading each and gaining familiarity with the steps well ahead of time.

OSINT

Open source intelligence (OSINT) is a broad term within information security. It focuses on the tools and means available to us for investigation and information retrieval. OSINT sits at the heart of doxxing campaigns but is also an important part of the process of preventing them. Typically it is a way of describing a methodology of piecing together scraps of information to form a dossier on a subject.

There are fancy multipurpose tools (like Maltego or Lampyre) that combine many datapoints into accessible graphs and datasets. As helpful as they can be for traditional penetration tests or corporate OSINT campaigns, they’re best used for investigations focused on organizations, mapping together details like employee email charts, LinkedIn profiles, and company network maps. They may not fit the needs of everyday people or liberation movement workers. Instead, we recommend referring to different OSINT resource lists that index together a bunch of different tools, then using those resources to create a list for yourself of which tools may be most helpful. 

Many, if not all, of the resources we cover below will be referenced in those guides, and themselves fall under the OSINT category. It’s important to note that the tools we reference in this particular blog post are only relevant at the time of publishing. The bigger ideas have a much longer shelf life than various tech tools. That said, in no particular order:

Breach Databases

When a company gets hacked and their customer data is leaked, that information often ends up in “breach databases,” that is, troves of peoples' data available for sale and reuse in illegal trades online. Because of the sensitivity of that type of information, it can potentially be used in doxxing campaigns. Some resources, like haveibeenpwned, note pieces of vulnerable identifying information in those databases and make it easy for people to see if their information is included. Others, like DeHashed, offer a similar sort of tracking, but for a fee. 

You may not have control over a company's digital security that could put your own data at risk, but you can gain insight into whether your information is already out there. This gives you the opportunity to control the accuracy of that data (such as changing your email address or phone number). Doing so is extremely inconvenient, but unfortunately, it may be the only agency you have when another’s company’s digital insecurity puts your own safety at risk.

Open Records

Public records (such as voter records, property records, business registration, medical licensing information, and more) present a dilemma. It is in the public interest for there to be levels of transparency on such information. On the other hand, making such personally-identifiable information accessible to those with ill-intent can lead to serious consequences. 

Instead of requiring a formal request through the courts, mirroring sites make this information easy to find online. Such sites often have forms where you can request your information be taken down. This doesn’t necessarily remove the records from existing, but it does remove a layer of convenie