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Tracking Censorship and Surveillance

ProPublica investigates the threats to privacy in an era of cellphones, data mining and cyberwar, including how citizens are digitally tracked by governments and corporations.

Impact of Our Reporting


Verizon to Pay $1.35 Million to Settle Zombie Cookie Privacy Charges

The settlement is the latest sign that the FCC is stepping up privacy enforcement actions.


Verizon Will Now Let Users Kill Previously Indestructible Tracking Code


Zombie Cookies Slated to be Killed

I Ramped Up My Internet Security, and You Should Too

Verizon’s Zombie Cookie Gets New Life

6 Tips for Protecting Your Communications From Prying Eyes

New Snowden Documents Reveal Secret Memos Expanding Spying

NSA Surveillance Lawsuit Tracker

Internet Censorship in China: We’ll Sing it for You

What's Really Happening with China's Great Firewall

Zombie Cookie: The Tracking Cookie That You Can't Kill

Inside the Firewall: Tracking the News That China Blocks

AT&T Stops Using Undeletable Phone Tracking IDs

Somebody's Already Using Verizon's ID to Track Users

NSA Documents Suggest a Close Working Relationship Between NSA, U.S. Companies

U.S. Company Helps Russia Block Prominent Putin Critic

Leaked Docs Show Spyware Used to Snoop on U.S. Computers

Meet the Online Tracking Device That is Virtually Impossible to Block

Here’s One Way to Land on the NSA’s Watch List

Privacy Tools: How to Block Online Tracking

Podcast: Mapping the NSA's Spying

FAQ For Our NSA Chart

No Warrant, No Problem: How the Government Can Get Your Digital Data

House Adopts Amendment to Bar NSA From Meddling With Encryption Standards

It’s Complicated: Facebook’s History of Tracking You

Why Online Tracking Is Getting Creepier

Privacy Tools: Encrypt What You Can

Weibo IPO Reveals a Company Struggling With Censorship

The U.S. Government: Paying to Undermine Internet Security, Not to Fix It

What the Proposed NSA Reforms Wouldn't Do

You Know Who Else Collected Metadata? The Stasi.

Podcast: What Your Smartphone Might Be Telling the NSA About You

Privacy Tools: Opting Out from Data Brokers

FAQ About NSA’s Interest in Angry Birds and Other ‘Leaky Apps’

Spy Agencies Probe Angry Birds and Other Apps for Personal Data

Privacy Tools: How to Build Better Passwords

Four Questionable Claims Obama Has Made on NSA Surveillance

Privacy Tools: How to Safely Browse the Web

Judge on NSA Case Cites 9/11 Report, But It Doesn't Actually Support His Ruling

Presidential Panel to NSA: Stop Undermining Encryption

Podcast: Spying with Avatars

World of Spycraft: NSA and CIA Spied in Online Games


China’s Memory Hole: The Images Erased From Sina Weibo

How to Get Censored on China’s Twitter

ProPublica Motion Seeks Release of Court Rulings on NSA Spying

NIST to Review Standards After Cryptographers Cry Foul Over NSA Meddling

Claim on “Attacks Thwarted” by NSA Spreads Despite Lack of Evidence

Government Standards Agency “Strongly” Suggests Dropping its Own Encryption Standard

Johns Hopkins and the Case of the Missing NSA Blog Post

Revealed: The NSA's Secret Campaign to Crack, Undermine Internet Security

Why We Published the Decryption Story

The Surveillance Reforms Obama Supported Before He Was President

FAQ: What You Need to Know About the NSA's Surveillance Programs

Six Ways Congress May Reform NSA Snooping

NSA Says It Can't Search Its Own Emails

Does the NSA Tap That? What We Still Don’t Know About the Agency’s Internet Surveillance

How the NSA’s High-Tech Surveillance Helped Europeans Catch Terrorists

Podcast: NSA Surveillance and Intelligence Gathering

Defenders of NSA Surveillance Omit Most of Mumbai Plotter's Story

The NSA Black Hole: 5 Basic Things We Still Don’t Know About the Agency's Snooping

The Best Stories on the Government’s Growing Surveillance

Was Petraeus Borked?

Is $22.5 Million a Big Enough Penalty for Google?

Announcing $22.5 Million Fine, FTC Says It Investigated Google’s Internet Tracking Early On

Does Cybercrime Really Cost $1 Trillion?

That’s No Phone. That’s My Tracker

How Many Millions of Cellphones Are Police Watching?

Our FTC Privacy Story and Its Critics

Correspondence Between the FTC and ProPublica

How a Lone Grad Student Scooped the Government and What It Means for Your Online Privacy

Cellphone Companies Will Share Your Location Data - Just Not With You

Cheat Sheet: Behind The U.S. Cyberattacks on Iran

Remember Stuxnet? Why the U.S. is Still Vulnerable

In the Evening Hours, CISPA Gets Some New Features

Is CISPA SOPA 2.0? We Explain the Cybersecurity Bill