Cryptology by Oliver Pell
This is an essay I wrote for a mathematics essay prize. We had a number of possible topics to choose from and I choose cryptology, because I already had a passing interest in thanks to my attempts to code encryption algorithms for my computer programs. It won, by the way ;-). This is the original essay with a few corrected spelling mistakes (though there are probably some left). I am currently studying at Imperial College, my home page is here.
A Brief History of Cryptography & Cryptanalysis
Early Cryptographic Systems
Cryptography During The Two World Wars
Cryptography In The Modern Age
Single Key Cryptography
Data Encryption Standard (DES)
Public Key Cryptography
The Key Distribution Problem
A Solution To The Key Distribution Problem
Properties For A Two-Key Cryptosystem
Rivest-Shamir-Adleman (RSA) Algorithm
"Real World" Usage Of The RSA Algorithm
Cryptography in the "Real World"
Applications Of Cryptography
Politics Of Cryptography
Types Of Cryptanalysis
Types Of Cryptanalytic Attacks
Cryptanalysis Of Public Key Ciphers
A Triumph of Cryptanalysis - Enigma
What Was Enigma?
Initial Work On Cryptanalysing Enigma
What Made It Possible?
The Turing Bombe
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