K.V. Srinivasa Rao  , M. Rama Krishna  , D. Bujji Babu  , 
    Cryptanalysis of a Feistel Type Block Cipher by Feed Forword Neural Network Using Right Sigmoidal Signals,
    International Journal of Soft Computing,
    Volume 4,Issue 3,
    2009,
    Pages 131-135,
    ISSN 1816-9503,
    ijscomp.2009.131.135,
    (https://makhillpublications.co/view-article.php?doi=ijscomp.2009.131.135)
    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.
    Keywords: Activation function;approximation problem;block cipher;cipher text;cryptanalysis;feedforword neural network;neuron;plain text;sigmoidal signal