serialized_nbytes LossyBootstrapKey.serialized_nbytes Shows the size of a lossy bootstrap key when serialized. Output serialized_nbytes, int from desilofhe import Engine engine = Engine(use_bootstrap=True) secret_key = engine.create_secret_key() lossy_bootstrap_key = engine.create_lossy_bootstrap_key(secret_key) serialized_nbytes = lossy_bootstrap_key.serialized_nbytes