The paper presents a quantum cryptography protocol for secure key distribution and coin tossing. It introduces the use of quantum mechanics, specifically the uncertainty principle, to achieve secure communication. By using polarized photons, the protocol ensures that any eavesdropping attempt would disturb the transmission, making it detectable. This allows two parties to securely share a random key, even without an initial shared secret. The protocol also includes a method for coin tossing using quantum messages, which is secure against traditional cheating but vulnerable to quantum phenomena like the Einstein-Podolsky-Rosen paradox. The paper discusses the theoretical foundations of quantum cryptography, including the properties of polarized photons and the use of quantum states for secure communication. It also addresses the limitations of quantum cryptography, such as the weakness of quantum transmissions and the lack of digital signatures. The paper outlines the steps for quantum key distribution, including the use of a public channel for verification and the use of quantum states to ensure security. It also describes the quantum coin tossing protocol, which is secure against traditional cheating but can be subverted by quantum effects. The paper concludes with the theoretical implications of these protocols and their potential applications in secure communication.The paper presents a quantum cryptography protocol for secure key distribution and coin tossing. It introduces the use of quantum mechanics, specifically the uncertainty principle, to achieve secure communication. By using polarized photons, the protocol ensures that any eavesdropping attempt would disturb the transmission, making it detectable. This allows two parties to securely share a random key, even without an initial shared secret. The protocol also includes a method for coin tossing using quantum messages, which is secure against traditional cheating but vulnerable to quantum phenomena like the Einstein-Podolsky-Rosen paradox. The paper discusses the theoretical foundations of quantum cryptography, including the properties of polarized photons and the use of quantum states for secure communication. It also addresses the limitations of quantum cryptography, such as the weakness of quantum transmissions and the lack of digital signatures. The paper outlines the steps for quantum key distribution, including the use of a public channel for verification and the use of quantum states to ensure security. It also describes the quantum coin tossing protocol, which is secure against traditional cheating but can be subverted by quantum effects. The paper concludes with the theoretical implications of these protocols and their potential applications in secure communication.