Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 422)

Increasing the Security of Documents
3JX3-07X
The machine is equipped with security functions designed to prevent documents from being leaked or tampered with.
Device Signature
The digital signature is added to scanned documents using a key and certificate mechanism in order to prove to
the recipient that the document has been created on the machine. The recipient can verify "the device that
created the document" and "whether the document has been tampered with." Before adding a device
signature, you need to generate a key and certificate (device certificate) that is used for the device signature
using the machine. Generating a Device Signature Key(P. 415)
Managing the Machine
414