Why can terrorist organizations be difficult to monitor using only technical intelligence?

Terrorist organizations are difficult to monitor using only technical intelligence—such as imagery and signals intelligence—because they are nonstate actors that, by their very nature, are not easily penetrated through technical means alone.1

While technical systems allow for the collection of vast amounts of data, relying exclusively on them can weaken the ability to combat these groups. Terrorist organizations have become increasingly sophisticated, often employing their own counterintelligence capabilities to evade detection. For example, some groups have utilized advanced technology to send enciphered communications and have even developed the ability to track photographic reconnaissance satellites.1

Because these organizations operate through decentralized cells and often utilize human networks, effective monitoring requires a flexible approach that integrates technical data with human intelligence. Relying solely on technical collection risks missing the nuanced activities of nonstate actors who adapt their methods to bypass electronic surveillance.1