1. Hans Rohrbach worked both as an algebraist and a number theorist and later worked as cryptanalyst at Pers Z S, the German Foreign Office cipher bureau, during World War II.
22 Facts About Hans Rohrbach
1. 2.
Hans Rohrbach was latterly known as the person who broke the American diplomatic O-2 cypher, a variant of the M-138-A strip cipher during 1943.
3.
Hans Rohrbach was a son of journalist Paul Rohrbach and his wife Clara, who were married in Berlin in 1897.
4.
Hans Rohrbach entered the Gymnasium at Berlin-Friedenau in the autumn of 1909 and studied there until Autumn 1917.
5.
The visit, which Hans Rohrbach called his propaganda visit, was a tour of American universities to raise money for impoverished Berlin students.
6.
Hans Rohrbach submitted it and was awarded his doctorate on 25 July 1932.
7.
In 1936, Hans Rohrbach was appointed senior assistant at the University of Gottingen.
8.
Hans Rohrbach served as Director of the Mathematical Institute there.
9.
Hans Rohrbach was a member of the Nazi Party and the Sturmabteilung, but was considered not fully reliable due to his friendship with Jewish colleagues.
10.
Hans Rohrbach was then Associate Professor in the Department of Mathematics between 1957 and 1969.
11.
Hans Rohrbach held this chair until he retired as professor emeritus in 1977.
12.
In 1937, Hans Rohrbach introduced a mathematical puzzle, which was a variation of James Joseph Sylvester's stamp puzzle:.
13.
The work undertaken by Hans Rohrbach was related to the computational problems associated with the manufacture and flight of V-weapons.
14.
Hans Rohrbach was awarded the War Service Cross 2nd Class in September 1944, for his work on the solution of the US Diplomatic Strip System O-2.
15.
Hans Rohrbach had originally broken the cipher in 1943 after working on it for more than a year.
16.
The Americans who made up the TICOM Team that investigated Pers Z S, ordered Hans Rohrbach to write a report on 6 August 1945, in the form of homework to describe the process.
17.
One of the people that Hans Rohrbach saved was the mathematician Ernst Max Mohr from execution.
18.
Hans Rohrbach is said to have described the war as already lost, the destruction of the Jews as a mistake.
19.
Hans Rohrbach's work was important for the war, especially the Luftwaffe.
20.
Hans Rohrbach was nevertheless found guilty and sentenced to death, but intervention by Rohrbach and Alexander Nikuradse resulted in his death sentence being suspended for six months; he was transferred to the Sachsenhausen concentration camp, later on 18 December 1944 to the Plotzensee Prison where he continued to undertake Mathematical calculations for the V-weapon programs.
21.
Hans Rohrbach became president of the Studentenmission in Deutschland an organization setup to spread Christian values in schools and universities.
22.
Hans Rohrbach published a number of books which espoused his Christian values.