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 convenience in accessing them.

Some states have programs called “Address Confidentiality Programs” that offer people the right to supplant address information with proxy addresses, keeping public records open but that specific piece of information potentially hidden.

Social Media

Going through and tightening the security and privacy settings of your various social media accounts is always a good idea, but it’s especially important if you are in the process of minimizing your digital footprint. Consider turning your discoverability to “private” or “hidden” (verbiage and details depend on the app) so that only users vetted by you are able to see your account.

To get a quick overview of the various accounts you have registered online, especially if you’ve been online for a long time, use a username search engine like What’s My Name or Namechk to see where your usernames have been registered. They may not be entirely accurate, but they are effective and quick. These tools are also helpful if you are at risk of being impersonated online and want to get an overview of where that may be taking place.

Data Brokers and Removals

Data brokers are craven, pernicious companies that present an existential risk to everyone in the digital age. Until that industry is no more, it’s up to us to protect ourselves and the ways that it endangers us by selling personal, sensitive information. The most effective way to get your information removed from their stores is to file requests manually. Yael Grauer’s BADBOOL project compiles and prioritizes the worst offenders in this industry and the means you can use to request data removals from them. This process can be grueling and time-consuming, so it may be worth investing in a service that automates the process. Though they’ve been found to be less effective than the DIY approach, there are some services that have stood out amongst the others in terms of efficacy when tested by third-party reviewers. If you’re a resident of California, you can more easily opt out through the new and exciting DROP tool.

Reverse Image Searching and FR Services

Services like PimEyes and Lenso have jumped on the profit-driven opportunity to create facial recognition as a service. They contribute to law enforcement investigations and predictive policing systems, as well as providing commercial services to abusers and stalkers. The gist of their service: upload a picture of someone (in this case, yourself) and it will use facial recognition technology to determine where else online that person has appeared. If your image is being shared online without your consent, this service will find out. 

Willfully participating in these services does mean having your image mapped, scanned, and stored by their systems. But if you believe you’re under the type of targeted harassment that includes your image being shared online against your will, it may be worth that tradeoff.

Extra Monitoring, Automated

This section is less about data minimization, and more about laying extra protections down in the event that doxxing or other coordinated harassment seems imminent. If you’re in the Google ecosystem of products, consider enrolling in their Advanced Protection Program, which offers a number of different features to keep you and your account safe. 

If you’re the focus of coordinated attacks that span from online communities to media outlets participating in the harassment, a service like Open Measures is worth looking into. It tracks, maps, and analyzes the spread of hateful information online. They provide free access to their open-source API, so with some technical fancy-footwork, you can automate this process.

Get Others Involved

Coordinated harassment is often a process of daisy-chaining targets and tactics together until there’s a meaningful process of harm being inflicted. This means that people in your community are also at risk. As we always say, privacy is a team sport. Get others involved in the process; there’s strength in numbers. 

A great way to do this is think of the activities you and your group are up to. What roles do individual members take on? Figure out a way to tack on some of the responsibilities you’re coming up with here onto those team members. Find ways to talk about it and share strategies, preferably using secure technology like Signal. You can coordinate together which tasks each person could take on, perhaps pulled from this blog post.

It’s a Process; Keep Yourself Apace for the Marathon, Not the Race

The process of data minimization and reclaiming agency over your digital footprint can be grueling and stressful. Don’t underestimate the toll it can take on your mental health. Take breaks, employ the help of friends, and take the time to make sure you’re first addressing the parts that are most relevant to your threat model. It may feel like there’s nothing to be done about protecting your digital privacy, but that’s just a symptom of surveillance capitalism’s psychological effect on its victims. There’s much you can do to stay safe, to protect yourself and others. Refer to this post and to the Surveillance Self-Defense project.