RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: https://www.khanacademy.org/labs/explorations/time-complexity

Many IoT (Internet of Things) devices have adopted MQTT as an efficient protocol for communication. Few IoT devices have embraced modern C++ as a viable language for implementations. MQTT (Message Queueing Telemetry Transport) is a reliable publish-subscriber based messaging protocol that can be found in diverse ecosystems such as servers, cell phones, and light bulbs. Unfortunately, existing op..