SafeGuard Full Disk Encryption with SafeGuard Power-on Authentication (POA) is the Sophos module for encrypting volumes on endpoints. It comes with a Sophos implemented pre-boot authentication named SafeGuard Power-on Authentication (POA) which support logon options like smartcard and fingerprint and a Challenge/Response mechanism for recovery.
Files are encrypted transparently. When users open, edit and save files, they are not prompted for encryption or decryption. Full Disk Encryption can be volume- or file-based with different keys and algorithms.