File encryption protects your data by converting it into unreadable code, accessible only with a decryption key. It’s essential for preventing data breaches, safeguarding personal and business info, ensuring secure data transfer, and meeting legal requirements like GDPR or PDPA. Encryption works through algorithms and keys—either symmetric (same key) or asymmetric (public/private key). Commonly used to secure documents, cloud storage, emails, and mobile data, encryption is a crucial layer of digital protection.