# Signals Intelligence ## Definition Signals intelligence (SIGINT) is intelligence derived from intercepted communications and other electronic signals under applicable collection authorities and legal frameworks. ## Corpus Context SIGINT links [[wiki/Telecommunications Infrastructure|telecommunications infrastructure]], [[wiki/Five Eyes|Five Eyes]], [[wiki/UKUSA Agreement|UKUSA]] and [[wiki/Intelligence Liaison|intelligence liaison]]. In [[wiki/Pantheon S1E6 — You Must Be Caspian|Pantheon S1E6]], unrestricted network access gives uploaded persons strategic agency inside the same communications field that states monitor and defend. ## Key Insight Interoperable communications create public connectivity and intelligence observability at the same time. These are different institutional layers operating on shared infrastructure. ## Sources / Provenance - [NSA — Signals Intelligence](https://www.nsa.gov/Signals-Intelligence/) - [GCHQ — Frequently asked questions](https://www.gchq.gov.uk/information/faqs-1d0b4d5b)