Dark Web vs Deep Web: How Stolen Data Travels Through the Internet

In the first half of 2025, the Identity Theft Resource Center reported 1,732 publicly disclosed data compromises in the U.S., resulting in over 165 million breach notifications to affected individuals and indicating that the year is on track to set a new record for reported incidents. 

Most of those breaches originate on the regular internet and result in data being sold on underground markets, including the dark web. But what is the dark web, and how does it differ from the deep web? This article clarifies the difference between the Dark Web and the Deep Web, reviews recent cases, and provides actionable steps to safeguard your digital life today.

Key Takeaways

• The deep web contains secure websites that we use every day, such as your online bank account or email inbox.
• The dark web is a hidden network requiring special software to access, often used by criminals to buy and sell data stolen from deep web databases.
• Billions of stolen identity records are currently circulating in underground markets.
• You can protect yourself by using strong passwords, enabling multi-factor authentication, and monitoring your identity.

Three Layers of the Internet Explained

The web is structured in three layers, with each layer sitting at a different depth.

The Surface Web (Clear Web)

This is the so-called tip of the internet iceberg. These are the public, indexed pages you can find using search engines like Google or Bing. News sites, online stores, and public blogs all live here.

The Deep Web

This layer is everything below the water line of the surface web. This includes any content not indexed by search engines but still accessible with normal browsers, as long as you have the correct login credentials or URLs. Your email inbox, online banking account, medical portals, corporate intranets, and subscription databases all exist on the deep web. The deep web is estimated to account for around 90% of all internet content. In fact, most of us use the deep web daily without realizing it.

The Dark Web

This layer is a very small part of that hidden space. Because the entire internet is difficult to measure, experts differ in how much of the dark web comprises the internet. It could be as much as 6% to as little as 0.01% of the internet. It runs on special networks, uses non-standard domains, and is designed to hide user and site identities. You cannot access the dark web with a standard browser. Instead, it requires specialized privacy software such as the Tor browser or Invisible Internet Project.

Deep Web vs. Dark Web: Key Differences and Examples

A quick comparison of the three layers of the internet:

What Actually Happens on the Dark Web?

In itself, the dark web is not inherently dangerous. It offers legitimate uses, such as hosting privacy-focused communities and providing a safe haven for journalists and activists in oppressive regimes, as well as a platform for whistleblowers.

However, it is also heavily used for criminal enterprises, including hosting marketplaces for illegal drugs, stolen data, malware, fake IDs, hacking services, and fraud shops. Security researchers estimate that credential theft drives nearly two-thirds of all underground transactions, involving more than 15 billion stolen account credentials. Furthermore, ransomware attacks and associated leak sites on underground forums increased by 11% in 2024 from the year before.

How Your Data Ends Up on the Dark Web

The conversation around the dark web continues to intensify each year, largely due to the sheer volume of data compromised and the increasingly sophisticated ways criminals are using it.

Data Breaches Feed Dark Web Markets

Breach notifications increasingly explain that ransomware actors may later publish or sell the stolen information on dark‑web leak sites, where, in some cases, it becomes freely available for download.

U.S. organizations account for 20% of data from breaches that end up on underground forums, according to a 2025 dark web analysis. In addition, recent major breaches in the telecom, education, and financial sectors have all seen customer data advertised or dumped on dark web leak sites.

This connects the dots for everyday users. A breach at your local healthcare provider on the deep web often leads directly to dark web exposure and new waves of fraud. If you receive a breach notification, your immediate next step should be changing the password for that specific account and any other account where you used the same credentials.

Multiple Uses of the Same Stolen Identity Data

Criminals do not just use your stolen data once. Instead, they recapture and aggregate the breached information, then reuse it across multiple attacks for years.

SpyCloud’s 2025 report shows a 22% growth in recaptured identity records year-on-year, growing from 43.7 billion to 53.3 billion distinct identity records. The risk is no longer a question of your data appearing on dark web markets, but how often and how much of it appears.

Rising Financial Impact of Cybercrime

On the dark web, data is traded at low prices. Your stolen credit card number might fetch just a few dollars, while your comprehensive identity profile might cost fifty dollars. Beyond raw data, the dark web offers “as-a-service” products. Criminals can rent ransomware-as-a-service, phishing-as-a-service, or botnets. They can even buy direct access to compromised corporate networks.

Given the scale of business on the dark web, the Federal Bureau of Investigation reported $16.6 billion in corporate and individual losses in 2024 from dark web operations.

This frames dark web data as the fuel behind real financial harm to households worldwide, making the distinction between the deep web and dark web personally relevant.

Is It Illegal to Access the Dark Web?

In the U.S. and many countries, using Tor or visiting dark web sites is entirely legal, as the technology itself is neutral. In fact, law enforcement and security researchers also operate on the dark web for investigations and threat intelligence.

What makes it illegal are the criminal acts you perform there, including buying or selling contraband, distributing illegal content, or participating in fraud and drug trafficking. Risk comes from behavior, and laws focus on illicit use, which shapes how platforms and law enforcement respond.

If you are merely curious about the dark web, it is best to avoid downloading dark web browsers, as navigating these spaces without proper security knowledge can accidentally expose your device and your data to malware.

Recent Law Enforcement Actions

The fight against dark web crime is ongoing, and authorities are actively disrupting these hidden networks.

Dark Web Market Takedowns and Sanctions

Law enforcement agencies worldwide are collaborating to dismantle major underground marketplaces. A prime example is the 2024 takedown of the Nemesis darknet platform, which had over 30,000 users and facilitated nearly $30 million in drug, money laundering, and other illegal service sales, including to U.S. buyers.

Following the takedown, the U.S. Treasury in 2025 sanctioned the Nemesis administrator, designating him under narcotics trafficking authorities and identifying dozens of associated crypto addresses. While law enforcement does the heavy lifting here, you can help by reporting any suspicious cyber activity or extortion attempts directly to your local authorities.

Crypto-Laundering Networks Behind Dark Web Crime

Criminals rely on cryptocurrency to move illicit funds, but investigators are getting better at tracking these digital trails. In a major 2025 case, law enforcement dismantled a $24-million dark web crypto-laundering operation, using blockchain intelligence and undercover buys to trace the illicit funds. Interestingly, investigators kept operating the laundering service covertly after the initial arrests to map a wider criminal ecosystem, including drug trafficking and hacking proceeds.

Emerging Legislative Focus

Governments are updating their legal frameworks to combat the unique threats posed by the hidden internet. For example, the proposed U.S. Dark Web Interdiction Act of 2025 targets those operating or transacting on dark web drug and contraband marketplaces, not ordinary privacy-seeking users. The bill aims to support law enforcement with enhanced tools and resources to investigate and prosecute dark web-facilitated crimes.

Cybercrime on the Dark Web

Criminals are finding new ways to apply pressure to their victims. For instance, ransomware has evolved into double and triple extortion schemes where attackers steal data, encrypt systems, and then threaten public leaks on dark websites if victims refuse to pay. Furthermore, criminals increasingly target vendors and service providers in supply chain attacks. In 1H 2025, supply chain attacks on 690 organizations resulted in the issuance of more than 78 million victim notifications.

Credential stuffing and account takeover remain massive threats. Large dumps of reused passwords from older breaches are constantly recycled for automated attacks. Even if you never visit the dark web, attackers will leverage these vulnerabilities and missteps to refine their tools and coordinate campaigns that land directly in your inbox. You can stop credential stuffing in its tracks by never using the same password twice.

The Cybersecurity and Infrastructure Security Agency (CISA) maintains a Known Exploited Vulnerabilities catalog, which highlights software flaws often first discussed or traded on dark web forums, and confirmed to be used in real-world attacks. Recent updates added multiple actively exploited vulnerabilities, with federal agencies ordered to patch them within strict timelines.

While we don’t recommend visiting the dark web to tune into these updates, we strongly suggest that you turn on automatic updates for your phone, computer, and all installed applications today to protect yourself from security vulnerabilities.

Who is Most a Risk?

While everyone is a potential target, certain groups and industries face elevated risks. Healthcare, financial services, education, and critical infrastructure are among the sectors whose data appears on underground forums. Professional services saw one of the fastest-growing attack rates in 2025, often serving as a gateway to compromise clients via supply-chain access.

Demographically, older populations, high-net-worth individuals, and small business owners often suffer disproportionately high financial losses once their data is abused. Older populations are particularly affected, with individuals aged 60 and above suffering $4.8 billion in total losses from fraud in 2024, of which nearly $2.83 billion were from crypto-related and investment scams that often rely on stolen data and underground communication channels.

Identity-related incidents now affect the vast majority of organizations, indicating broad risk across the global workforce. Recognizing yourself in this risk profile is the first step toward taking these threats seriously. If you fall into one of these high-risk categories, consider upgrading your email security to require physical security keys for login.

How to Protect Yourself from Dark Web Threats

Practice Good Deep Web Hygiene

By securing your deep web accounts, you cut off the supply of data to the dark web. You can start with the simplest yet most effective defenses:

• Use strong, unique passwords for every account: Never reuse passwords, especially for sensitive accounts like email, banking, and healthcare portals.
• Enable multi-factor authentication everywhere it is offered: After your password, this is a second form of verification, usually a code sent to your phone by the online service you are logging into. This makes it incredibly difficult for criminals to access your account, even if they have your password.
• Regularly update your software and operating systems: New updates patch the known vulnerabilities exploited by ransomware and other malware.
• Be skeptical of unsolicited messages: Always question unexpected messages, especially those referencing recent breaches, and verify requests through trusted channels. Many tracked losses stem from phishing and extortion, which rely on previously breached data for personalization.
• Use only highly reputable crypto exchanges: If you invest in cryptocurrency, ensure you are using trusted exchanges and storing your assets in cold wallets disconnected from the internet.

Monitor Your Data for Dark Web Exposure

You don’t have to lurk around the dark web to find out if your data has been exposed. Consumer identity monitoring services such as McAfee+ check the dark web for stolen email addresses, passwords, and other personal data, and alert you the moment your information appears in an underground forum, and take the necessary steps to protect yourself from identity theft.

Steps to Take If Your Data Is Found on the Dark Web

If you receive an alert that your data has been exposed, do not panic. Fast action can limit the damage; here’s what to do:

1. Immediately change the affected passwords everywhere they are reused, starting with your primary email and banking accounts.
2. Turn on multi-factor authentication and review your recent account activity and connected devices for anything suspicious.
3. If your Social Security number or financial data is involved, place fraud alerts or credit freezes with any of the three major credit bureaus: Experian, Equifax, and TransUnion.
4. Report fraud or identity theft to official government channels, such as IdentityTheft.gov, and the Internet Crime Complaint Center for online crime.
5. Bookmark the fraud reporting websites for your country, so you have them ready if an emergency strikes.

Surveys show that most breach victims experience at least one negative consequence, underscoring the need for a prompt, methodical response. For more tips on protecting yourself from a dark web attack, read this guide to check whether your information is on the dark web.

Final Thoughts

The deep web includes most of the legitimate, secure services we rely on every day, from banking to healthcare. On the other hand, the dark web, while a small part of the internet, is a highly consequential subset where stolen data and criminal markets thrive. Recent years have seen record data breaches, massive identity exposure, and billions in cybercrime losses, much of which is monetized through these dark web ecosystems.

You can combat cyberattacks that lead to your data ending up on the dark web by treating your deep web accounts like digital vaults and by auditing who has access to them. You should also assume your data is already a target and proactively freeze your credit if you suspect any of your information has been compromised.

You can employ powerful tools to help you secure your privacy and information. McAfee+ offers robust identity and dark web monitoring, secure VPNs to encrypt your connection, and advanced phishing protection. Password managers take the burden out of creating and remembering unique passwords for every site, while device-level security suites help you manage your credentials, detect malware, and block risky sites before they can steal your data.

Share these tips with your family members and help them set up stricter privacy settings on their social media accounts to avoid identity theft.