Jan Bury


Bury, Jan. "Assembling the Puzzle Game: The Jacek Jurzak Spy Case." Cryptologia 36, no. 3 (Jul. 2012): 215-229.

"This article is devoted to the analysis of a 1983 case conducted by the Polish security service, which culminated in the detection and compromise of a U.S. asset [Jacek Jurzak]. The achievement was made possible thanks to the cooperation of various communications intelligence branches of the communist Polish security service."

[CIA/80s/Gen; OtherCountries/Poland/CW]

Bury, Jan. "Breaking Unbreakable Ciphers. The Asen Georgiev Spy Case." Cryptologia 33, no. 1 (Jan. 2009): 74-88.

From Abstract: "The article discusses a Cold War spy case involving a Bulgarian national according to the documents preserved at the Polish Institute of National Remembrance. It details the modu operandi of both the US and Eastern Block secret services and the mistakes committed by both parties, which led to an agent's disclosure." Asen Hristov Georgiev spied for the CIA from 1956 until his arrest by Bulgarian State Security in 1963.

[CIA/60s/Gen; OtherCountries/Bulgaria]

Bury, Jan. "Finding Needles in a Haystack: The Eastern Bloc's Counterintelligence Capabilities." International Journal of Intelligence and CounterIntelligence 25, no. 4 (Winter 2012-2013): 727-770.

The author focuses on "several notable mid- and late-Cold War cases, in which Western assets were compromised and apprehended by Polish authorities."


Bury, Jan. "From the Archives: Polish Interwar MFA's Cipher Compromised?" Cryptologia 31, no. 3 (Jul. 2007): 268-277.

Abstract: "A 1940 report suggests that the cryptosystem used by the interbellum Polish Ministry of Foreign Affairs had been compromised, enabling the Germans to read the encrypted diplomatic traffic of the Poles and learn about their plans in advance."


Bury, Jan. "From the Archives: The U.S. and West German Agent Radio Ciphers." Cryptologia 31, no. 4 (Oct. 2007): 343-357.

From abstract: This article presents a "translation of an in-house research paper of the communist Polish counterintelligence depicting the ciphers and the one-way radio communications patterns used by the U.S. and West German intelligence services against Poland in the 1960s and early 1970s."

[CIA/Components/Tradecraft; OtherCountries/Poland/CW]

Bury, Jan.

1. "Operation Lotos: An Unsuccessful Attempt on U.S. Government Communications." Cryptologia 34, no. 1 (Jan. 2010): 60-87.

Using declassified files of the Polish security service, the author provides new details on an unsuccessful joint Polish-East German operation in the 1980s, which targeted the U.S. Embassy in Warsaw's satellite communications.

2. "Project Kalina: The Lotos Operation Conundrum." Cryptologia 36, no. 2 (Apr. 2012): 119-128.

From "Abstract": This article "discusses the late 1980s aftermath of a Cold War Polish and East German signal intelligence operation against US covert communication lines."

[Germany/East; OtherCountries/Poland/CW]

Bury, Jan. "Operation Stonka: An Ultimate Deception Spy Game." Cryptologia 35, no. 4 (Oct. 2011): 297-327.

Working from declassified files of the Polish communist security services, the author traces "a Cold War counterintelligence operation conducted by Polish and Soviet secret servies against the Stephan Bandera Faction of the Ukrainian Nationalists Organizatrion between 1959 and 1961."


Bury, Jan. "Polish Codebreaking during the Russo-Polish War of 1919-1920." Cryptologia 28, no. 3 (Jul. 2004): 193-203.

The author "discusses the early Polish signals intelligence and codebreaking efforts of the 1919-1920 war and emphasizes their role in Poland's victory during the crucial battle of Warsaw in August 1920."

[OtherCountries/Poland/Interwar; Russia/Interwar]

Bury, Jan. "Polish Cold War Codebreaking of 1959-1989: A Preliminary Assessment." Cryptologia 36, no. 4 (Oct. 2012): 341-379..

The author seeks "to assess the scope of communist Polish codebreaking during the middle and late periods of the Cold War based on the released documents available now at the Polish Institute of National Remembrance (IPN)."


Bury, Jan. "TELMA -- A Polish Wireless Communications Security Machine of World War II." Cryptologia 30, no. 1 (Jan. 2006): 31-38.

The author "discusses the development and use" by the Poles of a machine "designed to send telegraphic messages at high speeds in order to avoid interception by Nazi German signals intelligence."


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