Abstract
A lightweight encryption method is disclosed, designed to reduce computational resource demands on devices such as IoT devices and mobile phones. The method utilizes Shamir's three-pass protocol for key exchange, converting the encryption key into a signed digit number using an odd base. The message is broken into portions, with each portion encrypted by applying a sequence of non-commutative functions based on the signed digit representation of the key. This approach provides secure encryption while minimizing power and resource consumption.