Henryk Zygalski (; 15 July 1908 – 30 August 1978) was a Polish

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

and

cryptologist This is a list of cryptographers. Cryptography is the practice and study of techniques for secure communication in the presence of third parties called adversaries. Pre twentieth century * Al-Khalil ibn Ahmad al-Farahidi: wrote a (now lost) book ...

who worked at breaking German Enigma ciphers before and during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

Life

Zygalski was born on 15 July 1908 in Posen,

German Empire The German Empire (),Herbert Tuttle wrote in September 1881 that the term "Reich" does not literally connote an empire as has been commonly assumed by English-speaking people. The term literally denotes an empire – particularly a hereditary ...

(now Poznań,

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

). He was, from September 1932, a civilian

with the

Polish Polish may refer to: * Anything from or related to Poland, a country in Europe * Polish language * Poles, people from Poland or of Polish descent * Polish chicken *Polish brothers (Mark Polish and Michael Polish, born 1970), American twin screenwr ...

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's ''

Biuro Szyfrów The Cipher Bureau, in Polish: ''Biuro Szyfrów'' (), was the interwar Polish General Staff's Second Department's unit charged with SIGINT and both cryptography (the ''use'' of ciphers and codes) and cryptanalysis (the ''study'' of ciphers and ...

'' (Cipher Bureau), housed in the

Saxon Palace The Saxons ( la, Saxones, german: Sachsen, ang, Seaxan, osx, Sahson, nds, Sassen, nl, Saksen) were a group of Germanic * * * * peoples whose name was given in the early Middle Ages to a large country (Old Saxony, la, Saxonia) near the Nor ...

Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is officia ...

. He worked there with fellow

Poznań University Poznań () is a city on the River Warta in west-central Poland, within the Greater Poland region. The city is an important cultural and business centre, and one of Poland's most populous regions with many regional customs such as Saint John ...

alumni and Cipher Bureau cryptology-course graduates

Marian Rejewski Marian Adam Rejewski (; 16 August 1905 – 13 February 1980) was a Polish mathematician and cryptologist who in late 1932 reconstructed the sight-unseen German military Enigma cipher machine, aided by limited documents obtained by French mili ...

and

Jerzy Różycki Jerzy Witold Różycki (; Vilshana, Ukraine, 24 July 1909 – 9 January 1942, Mediterranean Sea, near the Balearic Islands) was a Polish mathematician and cryptologist who worked at breaking German Enigma-machine ciphers before and during World ...

. Together they developed methods and equipment for breaking Enigma messages. In late 1938, in response to growing complexities in German encryption procedures, Zygalski designed the "

perforated sheets The method of Zygalski sheets was a cryptologic technique used by the Polish Cipher Bureau before and during World War II, and during the war also by British cryptologists at Bletchley Park, to decrypt messages enciphered on German Enigma machin ...

," also known as "

Zygalski sheets The method of Zygalski sheets was a cryptologic technique used by the Polish Cipher Bureau before and during World War II, and during the war also by British cryptologists at Bletchley Park, to decrypt messages enciphered on German Enigma mac ...

," a manual device for finding Enigma settings. This scheme, like the earlier "

card catalog A library catalog (or library catalogue in British English) is a register of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations. A catalog for a group of libraries is also c ...

," was independent of the number of connections being used in the Enigma's plugboard, or commutator. After the war, he remained in exile in the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

and worked, until his retirement, as a lecturer in mathematical statistics at the

University of Surrey The University of Surrey is a public research university in Guildford, Surrey, England. The university received its royal charter in 1966, along with a number of other institutions following recommendations in the Robbins Report. The institut ...

. During this period he was prevented by the

Official Secrets Act An Official Secrets Act (OSA) is legislation that provides for the protection of state secrets and official information, mainly related to national security but in unrevised form (based on the UK Official Secrets Act 1911) can include all infor ...

from speaking of his achievements in

cryptology Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or '' -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adve ...

. He died on 30 August 1978 in

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, was cremated and his ashes taken to

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

Recognition

Shortly before his death, Zygalski was honored by the

Polish University in Exile The Polish University Abroad, or Polish University in Exile ( pl, Polski Uniwersytet na Obczyźnie, abbreviated PUNO), was initially established in London in 1949 (de facto 1952). The Polish University Abroad has a B.A. programme and does resear ...

with an honorary doctorate for his role in breaking Enigma. In 2000 he was posthumously awarded by President

Aleksander Kwaśniewski Aleksander Kwaśniewski (; born 15 November 1954) is a Polish politician and journalist. He served as the President of Poland from 1995 to 2005. He was born in Białogard, and during communist rule, he was active in the Socialist Union of Poli ...

the Grand Cross of the

Order of Polonia Restituta The Order of Polonia Restituta ( pl, Order Odrodzenia Polski, en, Order of Restored Poland) is a Polish state decoration, state Order (decoration), order established 4 February 1921. It is conferred on both military and civilians as well as on al ...

for his "outstanding contributions to the Republic of Poland". In 2009 the

Polish Post Poczta Polska ( lit. ''Polish Post'') is the state postal administration of Poland, initially founded in 1558. It is the largest mail-handling company in the country, which additionally provides courier, banking, insurance and logistics servi ...

issued a commemorative stamp featuring Henryk Zygalski alongside fellow cryptologists Marian Rejewski and Jerzy Różycki. In 2021 the Enigma Cipher Centre, an educational and scientific institution dedicated to the Polish mathematicians who broke the Enigma cipher, including Henryk Zygalski, opened in Poznań.

References

Władysław Kozaczuk Władysław Kozaczuk (23 December 1923 – 26 September 2003) was a Polish Army colonel and a military and intelligence historian. Life Born in the village of Babiki near Sokółka, Kozaczuk joined the army in 1944, during World War II, at Bia� ...

, ''Enigma: How the German Machine Cipher Was Broken, and How It Was Read by the Allies in World War II'', edited and translated by

Christopher Kasparek Christopher Kasparek (born 1945) is a Scottish-born writer of Polish descent who has translated works by numerous authors, including Ignacy Krasicki, Bolesław Prus, Florian Znaniecki, Władysław Tatarkiewicz, Marian Rejewski, and Władysław K ...

, Frederick, MD, University Publications of America, 1984, . {{DEFAULTSORT:Zygalski, Henryk Scientists from Poznań Polish Army officers 20th-century Polish mathematicians Pre-computer cryptographers Polish cryptographers Cipher Bureau (Poland) Polish emigrants to the United Kingdom 20th-century Polish inventors Academics of the University of Surrey 1908 births 1978 deaths Adam Mickiewicz University in Poznań alumni

Life

Recognition

See also

References