def _sign(self, m):   # alias for _decrypt
    if not self.has_private():
        raise TypeError("No private key")
    return self._decrypt(m)

def _verify(self, m, sig):
    return self._encrypt(sig) == m

while True :
    signature = os.urandom(2048//10)
    temp = pow(s2n(signature),e,n)
    temp = long_to_bytes(temp)
    try :
        if int(temp.split()[3]) > 10 :
            break
    except :
        pass