Optimisation heuristics for cryptology

Clark, Andrew J. (1998) Optimisation heuristics for cryptology. PhD thesis, Queensland University of Technology.


The aim of the research presented in this thesis is to investigate the use of various optimisation heuristics in the fields of automated cryptanalysis and automated cryptographic function generation. These techniques were found to provide a successful method of automated cryptanalysis of a variety of the classical ciphers. Also, they were found to enhance existing fast correlation attacks on certain stream ciphers. A previously proposed attack of the knapsack cipher is shown to be flawed due to the absence of a suitable solution evaluation mechanism. Finally, a new approach for finding highly nonlinear Boolean functions is introduced.

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ID Code: 15777
Item Type: QUT Thesis (PhD)
Supervisor: Dawson, Edward & Golic, Jovan
Keywords: Automated cryptanalysis, cryptography, cryptology, simulated annealing, genetic algorithm, tabu search, polyalphabetic substitution cipher, transposition cipher, stream cipher, nonlinear combiner, Merkle-Hellman knapsack, Boolean function, nonlinearity.
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Department: Faculty of Information Technology
Institution: Queensland University of Technology
Deposited On: 03 Dec 2008 03:48
Last Modified: 28 Oct 2011 19:38

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