def invsubword(w):
    """
    Transformation in the Inverse Cipher that is the inverse of SubBytes().
    """
    w = w.reshape(4, 8)
    return ISBOX[w[0]] + ISBOX[w[1]] + ISBOX[w[2]] + ISBOX[w[3]]
def invsubword ( w ) : w = w . reshape ( 4 , 8 ) return ISBOX [ w [ 0 ] ] + ISBOX [ w [ 1 ] ] + ISBOX [ w [ 2 ] ] + ISBOX [ w [ 3 ] ]
Transformation in the Inverse Cipher that is the inverse of SubBytes().