void save(){
  if (kSave == null) {
    kSave=new byte[blockSize];
  }
  System.arraycopy(k,0,kSave,0,blockSize);
}

void save ( ) { if ( kSave == null ) { kSave = new byte [ blockSize ] ; } System . arraycopy ( k , 0 , kSave , 0 , blockSize ) ; }
save the current content of this cipher .
