Surveillance and self-defense: A review of the year 2025.

Our guides on privacy protection and self-defense (Surveillance Self-Defense, SSD), which provide practical tips and explanations on how to deal with government and corporate surveillance, have had a successful year. We have published several important updates for existing guides and released three completely new guides. Given the frequent, large-scale protests in the United States, our guide on how to attend a protest remained one of the most popular this year, so we made sure our translations were up-to-date.

(Re)learn everything you need to know about encryption.
This year, we began a thorough review of our various encryption guides, starting with the basics and then moving on to more complex concepts. We have shortened each guide and tried to make them as clear and concise as possible, keeping in mind that these are complex topics. We have revised and edited a total of four guides:

• What do I need to know about encryption?
• Core concepts in encryption.
• Key verification.
• An in-depth explanation of end-to-end encryption: how do public-key encryption systems work?
  And if you're not sure where to start...

This content has been automatically translated using machine translation. The original version is available in the source language.

This content was automatically translated using machine translation. The original version is available in the source language.