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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.

FAQ For Our NSA Chart

How we categorized the various NSA revelations from the past year.

House Adopts Amendment to Bar NSA From Meddling With Encryption Standards

The measure was inserted into a defense appropriations bill and approved on a voice vote.

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

Facebook is launching an aggressive technique to track people across the Web.

Why Online Tracking Is Getting Creepier

The merger of online and offline data is bringing more intrusive tracking.

Privacy Tools: Encrypt What You Can

Here are some techniques that anybody can use to protect their privacy online.

Weibo IPO Reveals a Company Struggling With Censorship

Weibo, "China's Twitter," started offering shares on NASDAQ yesterday. Its regulatory disclosures reveal a company's balancing act between censoring too much and too little.

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

One lesson of the Heartbleed bug is that the U.S. needs to stop running Internet security like a Wikipedia volunteer project.

What the Proposed NSA Reforms Wouldn't Do

All the plans purport to end the bulk phone records collection program, but there are big differences.

You Know Who Else Collected Metadata? The Stasi.

Files obtained from the archives of the East German secret police show how the Stasi mapped social networks.

Privacy Tools: Opting Out from Data Brokers

Data brokers don't make it easy to see the data they hold about you. Here's what you can do to opt-out.

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

We lay out more from our story about how the NSA and its British counterpart have been scouring smartphone apps.

Spy Agencies Probe Angry Birds and Other Apps for Personal Data

New documents show the NSA and its British counterpart have access to advertiser data on smartphone apps, which can include your gender, income, and even whether you're a "swinger."

Privacy Tools: How to Build Better Passwords

The conventional wisdom about how to build strong passwords can be counter-productive. Here are some better ways to build passwords that are hard to crack.

Four Questionable Claims Obama Has Made on NSA Surveillance

President Obama, who delivered a speech on surveillance policy today, has made a series of misleading statements about the NSA.

Privacy Tools: How to Safely Browse the Web

It’s not easy to keep your data private while surfing the Internet, but here are a few tools that can help.

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

A new ruling supporting the NSA's metadata surveillance program points to the 9/11 report as evidence for the necessity of such a program. Except the 9/11 report doesn’t contain the evidence the judge says it does.

Presidential Panel to NSA: Stop Undermining Encryption

A panel of experts appointed by President Obama says the U.S. government should get out of the business of weakening technology used to secure communications.

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