Taken at the National Cryptologic Museum, NSA.

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

"Codes & Clowns" was an exhibtion devoted to Claude Elwood Shannon (April 30, 1916 – February 24, 2001) who was an American mathematician and electronic engineer known as "the father of information theory" and cryptography.

credit: Otto Saxinger

Taken at the National Cryptologic Museum, NSA.

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

ID card of Joan Clarke (played by Keira Knightley) in an exhibition about the movie "The Imitation Game" at Bletchley Park.

Taken at the National Cryptologic Museum, NSA.

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

Bitcoin wallet applications are used for the safe and secure transaction. It is a type of cryptography used for the secured transaction through the digital information.

This sigil from medieval magic was thought to be a summation of all the cosmology and numerology known in the West. It required knowledge of geometry, astronomy, astrology, mathematics, science, cryptography and more. And I've drawn it. Unfortunately, this doesn't make me any more scientifically literate in today's terms than when I began. This is kind of like being a teacher in the 21st century who doesn't know anything about computers: doing the same old stuff doesn't help your students move forward. It just perpetuates old paradigms.

This is an image of fol. 1r from University of Pennsylvania LJS 225: Litterarum simulationis liber, by Zopello, Michael, from Rome?, dated to between 1455 and 1458.

LJS 225 is a presentation copy for Pope Callistus III of a work on cryptography that describes two systems: in the first, Italian words beginning with one letter are all represented by Italian words beginning with another letter; in the second, signs or symbols represent letters or entire Italian words (titles, city names, and numbers).

Access this manuscript at openn.library.upenn.edu/Data/LJSchoenbergManuscripts/html....

OPenn is a website that offers easy access to free cultural works from Penn Libraries and other institutions. Access these collections and learn more at openn.library.upenn.edu.

Metadata is copyright ©2015 University of Pennsylvania Libraries and is licensed under a Creative Commons Attribution 4.0 International License.

Colossus: The Secrets of Bletchley Park's Codebreaking Computers by Jack Copeland

i09_0214 179

All SOE recruits underwent initial training at Wanborough Manor in Guilford

Taken at the National Cryptologic Museum, NSA.

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

130913-N-BB534-173 SAN DIEGO (Sept. 13, 2013) Chief Cryptographic Technician Maintenance Thomas Kaminsky places Chief Ship’s Serviceman Shannon Hipperson’s cover during a pinning ceremony for Sailors assigned to amphibious transport dock ship USS Green Bay (LPD 20). Green Bay is currently in BAE Systems San Diego Ship Repair undergoing a scheduled maintenance availability. (U.S. Navy photo by Mass Communication Specialist 1st Class Elizabeth Merriam/Released)

130913-N-BB534-670 SAN DIEGO (Sept. 13, 2013) Chief Cryptographic Technician Technical Ebony Seymoure embraces a fellow chief after her pinning ceremony for Sailors assigned to amphibious transport dock ship USS Green Bay (LPD 20). Green Bay is currently in BAE Systems San Diego Ship Repair undergoing a scheduled maintenance availability. (U.S. Navy photo by Mass Communication Specialist 1st Class Elizabeth Merriam/Released)

These were mounted on wheel banks

Bombe

i09_0214 127

Turing memorial in Sackville Park, Manchester. He ended up being an icon for computer science, cryptography and gay rights.

Note the fingernails - being memorialized close to a school is risky.

The full IBM 4758 mainboard that handles the sensitive cryptographic material. This consists of the UltraCypher chip from IBM (custom, the CBGA package) and an AMD ELAN SC4xx. The former contains DES, MD5 and RSA acceleration functionality.

Mathematics is the core discipline of the National Security Agency. Algebra, number theory, real and complex analysis, probability theory and statistics are used on a daily basis to solve challenging problems in information security and communications technology.

i09_0214 192

Taken at the National Cryptologic Museum, NSA.

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

Commander Denniston's Office:

Commander Alexander (Alastair) Denniston was the first Operational Director of the Government Code and Cypher School (GC&CS), and it was in this office that the “special relationship” between the UK and USA is said to have been born.

In early 1941, before they had entered the war, the first party of US officers arrived at Bletchley Park to understand more of the work undertaken there. They visited in high secrecy and Denniston told his secretary, Barbara Abernethy, to bring in the sherry and then depart and never breathe a word that they had entertained Americans.

It was also here that Commander Denniston welcomed all new recruits to the Top Secret Bletchley Park. Following meetings with the Polish Cypher Bureau in 1938, Denniston had recognised the need for academics and in particular mathematicians, to be involved in cryptographic work. He subsequently began planning for a proposed expansion of GC&CS by drawing up a list of so-called ‘men of the professor type’ who agreed in the event of war, to report to GC&CS’s new wartime base at Bletchley Park. This list included Codebreakers Alan Turing and Gordon Welchman but also, intriguingly, The Hobbit and Lord of the Rings author, JRR Tolkein who declined his place at GC&CS.

Pictures taken on a visit to Bletchley Park

Bletchley Park was the central site for Britain's codebreakers during World War Two. Run by the Government Code and Cypher School (GC&CS), it regularly penetrated the secret communications of the Axis Powers – most importantly the German Enigma and Lorenz ciphers. The official historian of World War II British Intelligence has written that the "Ultra" intelligence produced at Bletchley shortened the war by two to four years, and that without it the outcome of the war would have been uncertain

The TSEC/KL-7 was an off-line non-reciprocal rotor encryption machine. The KL-7 had rotors to encrypt the text, most of which moved in a complex pattern, controlled by notched rings. The non-moving rotor was in fourth from the left of the stack. The KL-7 with 12 rotors also encrypted the message indicator and was code named ADONIS.

Wikipedia en.wikipedia.org/wiki/KL-7

i09_0214 157