Secure Sockets Layer
Secure Sockets Layer (SSL) is a cryptographic protocol designed to provide secure communication over a computer network, primarily the internet. It establishes an encrypted link between a web server and a client (like a browser), ensuring that all data transmitted remains private and integral. SSL was the predecessor to Transport Layer Security (TLS), which has largely replaced it due to security vulnerabilities.
Developers should learn SSL to understand the foundational principles of web security, such as encryption, authentication, and data integrity, which are critical for protecting sensitive information like passwords, credit card details, and personal data. It's essential when implementing HTTPS for websites, securing APIs, or configuring servers to prevent eavesdropping and man-in-the-middle attacks, especially in e-commerce, banking, and any application handling user data.