March 22, 2012
      
                  
        
  Author(s)
  Donghoon  Chang,   Morris  Dworkin,   Seokhie  Hong,   John M.  Kelsey,   Mridul  Nandi
 
       
            
    
    
        The sponge construction, designed by Bertoni, Daemen, Peeters, and Asscheis, is the framework for hash functions such as Keccak, PHOTON, Quark, and spongent. The designers give a keyed sponge construction by prepending the message with key and prove a