<https://abcnews.go.com/blogs/headlines/2014/05/ex-nsa-chief-...>
As Bruce Schneier has noted, metadata equals surveillance, as it's actually far more amenable to analysis and inference than whole-text or audio capture. Though that latter may have shifted significantly with the rise of LLM AI techniques.
<https://www.schneier.com/blog/archives/2014/03/metadata_surv...>
