Wheedham: An Automatically Designed Block Cipher by means of Genetic Programming - Hernandez-Castro, J.C.; Estevez-Tapiador, J.M.; Ribagorda-Garnacho, A.; Ramos-Alvarez, B. (2006 IEEE International Conference on Evolutionary Computation, Evolutionary Computation, 2006. CEC 2006. IEEE Congress on, 2006)