Setup and Registration 
6-26 OPERATION GUIDE
Encryption
This method allows you to communicate with originals encrypted by the 
sending system. Therefore, even when a third party tries to view the 
originals in the middle of communication by some means, the third party is 
prevented from knowing the actual contents of the originals. The originals 
received are reverted to the originals as they were before transmission 
(decrypted) by the receiving system, and printed. This is an extremely 
effective communication method for sending confidential documents that 
are not to be opened by a third party.
IMPORTANT: In order to use encryption communication, the fax of the 
other party needs to be an our-brand system with the same type of 
encryption functions.
In encryption communication, in order to encrypt and decrypt originals, the 
sending and receiving systems must use the same 16-digit encryption key. 
When the encryption key differs between the sending system and the 
receiving system, the encryption cannot be conducted. Therefore, the 
sending system and the receiving system need to have the same 
encryption key and 2-digit key No. registered in advance.
Description of settings at sending and receiving systems
Scan originals Output originals
Encrypt Decrypt
Encryption
Sending system Receiving system
Settings
Sending 
system
Receiving 
system
Reference 
page
Encryption Key No. (A) 2 digits (B) 2 digits 6-27
Encryption Key (C) 16 digits (C) 16 digits 6-27
Key No. of Address Book 
(or when the number is 
directly dialed)
(A) 2 digits 6-27
Receiving system 
encryption box number 
†
(D) 4 digits 6-28
Encryption Box No. 
†
(D) 4 digits -
Key No. in reception 
setting
(B) 2 digits 6-30
†. When the machine receives originals, the Encryption Box is not used.