Operating agency Office for State Protection (UOP)

Seal UOP.gif

Enigma family XI
Country Poland

Polish (icon)

Operational detail pages
Active stations
Inactive stations G02, M04, E23

The SB or Służba Bezpieczeństwa (Polish State Security), replaced by the UOP or Urząd Ochrony Państwa (Office for State Protection) in 1990 after the fall of communism, were the agencies identified in declassified documents[1] as the operators of the Swedish Rhapsody family of numbers stations including G02, and M04, as well as the subsequent E23 which succeeded to G02.

In 2002, the UOP was split into two separate agencies: ABW, Agencja Bezpieczeństwa Wewnętrznego (Internal Security Agency), and AW, Agencja Wywiadu (Foreign Intelligence Agency). E23 operations lasted from 1998 to 2007, so it seems likely that the agency that carried them on following the split of the UOP was one of these two successors.


  1. Numbers & Oddities #200 (May 2014) [accessed March 10th, 2018]
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