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         This is a file from the  Wikimedia Commons. The description on its  description page there is shown below.Commons is a freely licensed media file repository.  You can help. 
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        DES F-function, Original diagram for Wikipedia.
        
       
        
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         This image has been released into the  public domain by its author,  Matt Crypto. This applies worldwide. 
          In some countries this may not be legally possible; if so:  Matt Crypto grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.  
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        Date/Time | 
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        | current | 
         17:39, 9 January 2005 | 
        640×616 (41 KB) | 
        Hellisp | 
        
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