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FIESTAL NETWORKS
: 
Fig: Fiestal cipher 
ISRJournals and Publications
Page 117

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International Journal of Advanced Research in
Computer Networking,Wireless and Mobile Communications
Volume: 2 Issue: 3 26-Jul-2014,ISSN_NO: 2320-7248
 
Horse fiestal was one of the researchers in the field of cryptography and can be considered the 
father of modern block ciphers (MBC). This technique is used to construct block cipher based 
algorithms and mechanisms. Fiestal network implements an number of iterations on a block of 
data. A fiestal network works by splitting the data block in two equal pieces and applying 
encryption in multiple rounds. Each round implements permutation and combination derived from 
the primary function.
The working procedure of fiestal network is: 
Splits each block into two halves 
Right half becomes new left half 
New right half is the final result when the left half is XOR’d with the results of the right half and 
the key.