Echelon

Appraisal of The Technologies of Political Control (via European Parliament)

Technologies of Political Control (scanned, via Cryptome)

Interception Capabilities 2000 (EP Report on ECHELON and COMINT, via NRC Handelsblad)

Working Papers From the European Parliament/STOA:

Volume 1: Development of Surveillance Technology and Risk of Abuse of Economic Information (pdf)
Volume 2: The state of the art in Communications Intelligence (COMINT)(pdf)
Volume 3: Encryption and cryptosystems in electronic surveillance (pdf)
Volume 4: The legality of the interception of electronic communications (pdf)
Volume 5: The perception of economic risks arising from the potential vulnerability of electronic commercial media to interception (pdf)