public void reset(){
  System.arraycopy(IV,0,ofbV,0,IV.length);
  byteCount=0;
  cipher.reset();
}

public void reset ( ) { System . arraycopy ( IV , 0 , ofbV , 0 , IV . length ) ; byteCount = 0 ; cipher . reset ( ) ; }
reset the feedback vector back to the iv and reset the underlying cipher .
