Secure Text Encryption and Decryption with Vanilla JavaScript

In today's digital age, securing sensitive information like API keys, passwords, and user data is crucial. A robust encryption and decryption strategy can prevent unauthorized access and ensure data confidentiality. Encryption transforms readable data into a scrambled format that can only be read if decrypted with the correct key. A solid encryption mechanism protects API keys, sensitive user information, and data transferred over insecure channels. The Web Crypto API provides a modern and secure approach to encryption and decryption in JavaScript. The AES-GCM standard is used for encryption and integrity verification, involving password derivation, salt and IV generation, encryption, and decryption. The JavaScript implementation involves converting between ArrayBuffer and hexadecimal, deriving a strong encryption key from a password, and encrypting and decrypting text with a password. The encryption function generates a random salt and IV, derives a key, and encrypts the text, while the decryption function derives the key and decrypts the text. It is essential to follow security best practices, such as using a strong password, storing salt and IV safely, avoiding hardcoded secrets, and using HTTPS. Encrypting sensitive information like API keys is a fundamental step in securing applications.