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Electronic Frontier Foundation | Surveillance Self-Defense

Access Electronic Frontier Foundation’s Surveillance Self Defense.

ssd.eff.org/

Logo for the Electronic Frontier Foundation's Surveillance Self-defense site featuring an infinity symbol encircling a lock and key.We’re the Electronic Frontier Foundation, an independent non-profit working to protect online privacy for over thirty years. This is Surveillance Self-Defense: our expert guide to protecting you and your friends from online spying.

Read the BASICS to find out how online surveillance works. Dive into our TOOL GUIDES for instructions to installing our pick of the best, most secure applications. We have more detailed information in our FURTHER LEARNING sections. If you’d like a guided tour, look for our list of common SECURITY SCENARIOS.

Contributor: Alexandria Chisholm, Penn State University Libraries.

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Libraries Stand for Privacy Participant Handbook Copyright © 2025 by Sarah Hartman-Caverly is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.