File encryption software for Windows - data protection and strong encryption with Dekart Secret Keeper. Dekart Secrets Keeper is a file encryption program that allows you to protect your important files directly from Windows Explorer and Microsoft Office. You can be sure your data will be safe, as all information is protected and encrypted with 256-bit AES NIST certified encryption. This file encryption program also allows you to make portable encrypted archives, making sure you can access your confidential information everywhere.