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EFFecting Change: Privacy's Defender on March 19

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Our Work

The Playpen Story: Rule 41 and Global Hacking Warrants

The warrant the FBI used in the Playpen investigation—which resulted in the delivery of malware to over a thousand computers, located around the world—violated Rule 41, an important rule of federal criminal procedure. Although Rule 41 may seem obscure, it plays a vital role in limiting when federal law...

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A Digital Rumor Should Never Lead to a Police Raid


Law Enforcement, Courts Need to Better Understand IP Addresses, Stop Misuse
If police raided a home based only on an anonymous phone call claiming residents broke the law, it would be clearly unconstitutional.
Yet EFF has found that police and courts are regularly conducting and...

Locational Privacy

Unreliable Informants: IP Addresses, Digital Tips and Police Raids

How Police and Courts are Misusing Unreliable IP Address Information and What They Can Do to Better Verify Electronic Tips
The digital revolution has given law enforcement more tools to help track and identify us than ever before. Yet as law enforcement increasingly relies on electronic evidence to investigate...

The Playpen Story: Some Fourth Amendment Basics and Law Enforcement Hacking

It’s an old legal adage: bad facts make bad law. And the bad facts present in the Playpen prosecutions—the alleged possession and distribution of child porn, coupled with technology unfamiliar to many judges—have resulted in a number of troubling decisions concerning the Fourth Amendment’s protections in the digital age.

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BaycloudSystems Joins EFF's Do Not Track Coalition

Baycloud Systems has become the latest company to join the EFF’s Do Not Track (DNT) coalition, which opposes the tracking of users without their consent. Baycloud designs systems to help companies and users monitor and manage tracking cookies. Based in the UK, it provides thousands of sites across Europe...

If You Build A Censorship Machine, They Will Come

If you have the power to censor other people’s speech, special interests will try to co-opt that power for their own purposes. That’s a lesson the Motion Picture Association of America is learning this year. And it’s one that Internet intermediaries, and the special interests who want to regulate them,...

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