The cef file extension is related to the SanDisk CruzerLock an encryption tool. The cef file stores encrypted data.
CEF file extension - SanDisk CruzerLock encrypted file
What is cef file? How to open cef files?
File type specification:
The cef file extension is associated with SanDisk CruzerLock application for file encryption that allows users to protect their case sensitive data.
The cef file stores encrypted data.
SanDisk CruzerLock was distributed with SanDisk USB disks. It is obsolete product.