Secure messaging refers to the use of technology to send and receive messages in a way that protects the content from unauthorized access. This often involves encryption, which scrambles the message so that only the intended recipient can read it. Secure messaging is commonly used in various fields, including healthcare and finance, to ensure sensitive information remains confidential. Many secure messaging platforms also offer features like message expiration and two-factor authentication to enhance security. Popular applications include Signal, WhatsApp, and Telegram, which prioritize user privacy and data protection. These tools help individuals and organizations communicate safely in an increasingly digital world.