AnimplementationofthehashfunctionsSHA-256,384and512ispresented,obtainingahighclockratethroughare-ductionofthecriticalpathlength,bothintheExpanderandintheCompressorofthehashscheme.Thecriticalpathisshowntobethesmallestachievable.Synthesisresultsshowthatthenewschemecanreachacloc