Encryption is the process of transforming readable plaintext into unreadable ciphertext to mask sensitive information from unauthorized users. Encryption converts sensitive information or data into a secret code to prevent unauthorized access. Learn how to protect your personal data with encryption. Learn about the process of transforming information in a way that only authorized parties can decode, and the history and types of encryption techniques. Explore the modern uses of encryption in cryptography, security and commerce. Encrypt or decrypt any file with the native JavaScript web crypto API locally in your browser!