kek = keker(curve, prv_key_our, bytes(pub_key_their), ukm)
self.assertIsNotNone(rek["encryptedKey"].defined)
_, encrypted_key = rek["encryptedKey"].defined
kek = keker(curve, prv_key_our, bytes(pub_key_their), ukm)
self.assertIsNotNone(rek["encryptedKey"].defined)
_, encrypted_key = rek["encryptedKey"].defined