Quantum mechanics is a branch of physics that deals with the behavior of particles on an atomic and subatomic level. Quantum computers are computers that are based on the principles of quantum mechanics and exploit the principles of quantum entanglement, superposition, and interference to process information. Quantum communication is a process that utilizes the laws of quantum physics to protect data by sending encrypted data as classical bits over networks, while the keys to decrypt the information are encoded and transmitted in a quantum state.