negate Engine.negate(ciphertext) Returns the ciphertext with its sign inverted. Does not consume any level. Input: Ciphertext Output: Ciphertext from desilofhe import Engine engine = Engine() secret_key = engine.create_secret_key() public_key = engine.create_public_key(secret_key) message = [1, 2, 3] ciphertext = engine.encrypt(message, public_key) negated = engine.negate(ciphertext)