Black Echo

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MAINWAY Phone Metadata Analysis Program

MAINWAY was not just a database. It was one of the NSA’s central systems for storing, correlating, and chaining phone metadata in order to discover networks, identify links, and surface targets of interest. This entry explains what MAINWAY was, how it fit into STELLARWIND and Section 215, and why it became one of the defining symbols of the phone dragnet era.

Declassified / Nsa/surveillance program/2026-03-30
Articlewell-supported at the program and authority leveBrowse result

BLARNEY Telecom Intercept Program

BLARNEY is one of the most revealing partially exposed NSA collection programs of the modern era. This entry traces its 1978 origin, its use of domestic cable and switching infrastructure, its role in FISA and Section 702 collection, and its place in the broader history of telecom-assisted foreign intelligence interception.

Declassified / Nsa/declassified collection program/2026-03-29
Articlewell-supported at the program and analytic levelBrowse result

CO-TRAVELER and Mobile Location Tracking

CO-TRAVELER was one of the most revealing mobile-surveillance programs exposed in the Snowden archive. This entry traces how NSA collected enormous volumes of cellphone location metadata, used analytic techniques to identify phones moving together, and turned routine mobile-network signaling into a global relationship-mapping tool.

Declassified / Nsa/declassified location analytics program/2026-03-29