from New York, NY
Author
David A. Kahn
ISBN #
0819404241
Author
David S. Kahn
ISBN #
0375752722
Author
David S. Kahn
ISBN #
0375752730
1840
Died:1902
Delastelle's work on the four-square cipher was published in a book in 1902, and was a variant on the earlier Playfair cipher.
Cryptographer
Area of science:Cryptography
Professional
07 February 1930 • New York City
Spouse:Susanne Fiedler (divorced)
Children:Oliver and Michael
Journalist • Author • Historian • Journalism Professor
History • Cryptography • Photography • Military intelligence
Studied at:University of Oxford
Specialty:Cryptographer
Science writer • Male writer • 20th-century writer • 21st-century writer
Skill:Communications • Domain (Apollo)
…"The solution", writes historian David Kahn, "was Rejewski's own stunning achievement, one that elevates him to the pantheon of the greatest cryptanalysts of all time."[18] Rejewski used a mathematical theoremthat two permutations are conjugate if and only if they have the same cycle structu...