End-to-End Encryption (E2EE) is a method of data transmission where only the communicating users can read the messages. In this system, the data is encrypted on the sender's device and only decrypted on the recipient's device, ensuring that no third party, including service providers, can access the content. This technology is widely used in messaging applications like WhatsApp and Signal to protect user privacy. The primary goal of E2EE is to safeguard sensitive information from unauthorized access. By using cryptographic keys that are only known to the sender and receiver, E2EE provides a robust layer of security, making it difficult for hackers or government agencies to intercept and decipher the communication.