This function encrypts data that is stored in the machine's NVRAM, or micro SD card.
- Address book information
 - User code/authentication information
 - Temporarily stored documents
 - Logs (Job log/access log/Eco-friendly log)
 - Network I/F setting information
 - System settings information
 - SAF/Fax communication history
 
The notes relating to the microSD card do not apply to models not equipped with a microSD card.