CEF file contains compressed and encypted email and attachments data archive created with CenturionMail software. CEF can be converted into executable files, and supports password-protected decryption and extraction. File is encrypted with 256 bit encryption key.

CEF files are used for secure transfer of sensitive messages, files or file folders in a form of email message. CenturionMail creates ZIP, CAB or EXE archives by default, however user can choose non-standard file extension such as CEF. CEF. This file format isn’t blocked by mail software or firewalls. CenturionMail integrates with Microsoft Outllook easily.