Which of the following is a method for detecting surveillance?

Limiting information available online is a proactive method for detecting surveillance because it helps reduce the amount of data that potential adversaries can collect about individuals or organizations. When less information is accessible online, it becomes more challenging for someone conducting surveillance to gather context and connections that could lead to targeting individuals or assets.

By controlling the online narrative and reducing the digital footprint, individuals can create a more secure environment. This strategy not only deters potential surveillance but also makes it harder for threat actors to obtain useful intelligence. A limited online presence can create uncertainty for those attempting to surveil, as they may not have enough information to make informed observations or conclusions.

Other methods, such as increasing visibility in public spaces or only communicating face-to-face, can enhance situational awareness and reduce the chances of being surveilled, but they do not directly tackle the issue of information availability. Similarly, using encrypted emails is an excellent method for securing communication but focuses on safeguarding information rather than actively detecting surveillance efforts. The emphasis on reducing digital information is crucial in combating modern surveillance techniques effectively.