Abstract: In this study, we introduced right sigmoidal signal as an activation function for block cipher to perform an approximation problem. We used right sigmoidal signal activation function for feed forward neural network used as a cryptanalysis tool for a Fiestel type block cipher problems.
K.V. Srinivasa Rao , M. Rama Krishna and D. Bujji Babu , 2009. Cryptanalysis of a Feistel Type Block Cipher by Feed Forword Neural Network Using Right Sigmoidal Signals. International Journal of Soft Computing, 4: 131-135.