{HEAD ~ a fixed MD5 nonlinear function processing unit} configured to perform {TAIL ~ a fixed nonlinear function} on the B, C and D register values, wherein the fixed MD5 nonlinear function processing unit implements only a single hardware implemented MD5 nonlinear function 
configured to perform
{ HEAD ~ a fixed MD5 nonlinear function processing unit } configured to perform { TAIL ~ a fixed nonlinear function } on the B , C and D register values , wherein the fixed MD5 nonlinear function processing unit implements only a single hardware implemented MD5 nonlinear function
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH