'Called to encrypt the packet.  Simply record that encryption was used
and return the data unchanged.'

def encrypt(self, x):

    self.usedEncrypt = True
    if ((len(x) % self.encBlockSize) != 0):
        raise RuntimeError(('length    %i    modulo    blocksize    %i    is    not    0:    %i' % (len(x), self.encBlockSize, (len(x) % self.encBlockSize))))
    return x
