Encryption and Digital Signature Settings
402
Encryption and Digital Signature Settings
13
Configuration on Sender and Recipient
To transmit e-mails encrypted by S/MIME and with digital signatures attached, register the
required certificate on equipment of a sender and a recipient.
The following shows the certificate settings necessary to encryption and digital signature.
Step1 Configuration on the Machine
This section describes configuration procedures to set up a certificate with CentreWare
Internet Services.
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You cannot use a self-signed certificate created with CentreWare Internet Services for S/MIME.
Step2 Configuration on Sender and Recipient
To transmit e-mails encrypted or with digital signature attached, a device certificate and a
personal certificate must be registered with each machine.
This section describes certificates required for destination and source, and registration
procedures.
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Required certificates include a trusted root certificate authority and all intermediate certificate authorities
that are registered in the path of a certificate to use.
When source is the machine and destination is a computer
The personal certificate of a computer must be registered on the machine. And the device
certificate of the machine must be registered on a computer.
To register the computer’s personal certificate, use CentreWare Internet Services.
There are two methods to register the machine’s device certificate to a computer:
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Send an e-mail with S/MIME digital signature to a computer from the machine
andregister it to the certificate store of an e-mail application in the computer.
To send an e-mail with S/MIME digital signature, select [Always add signature] or[Select
during send] for [Digital Signature - Outgoing E-mail] under [Tools] > [System Settings] >
[Connectivity & Network Setup] > [Security Settings] > [S/MIME Settings] in advance.
Source Destinatio
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Encryption Digital Signature
Certificate to
beregistered to the
source
Certificate to
beregistered to
thedestination
The machine Computer Personal certificate of
thecomputer
Device certificate for S/
MIMEof the machine
Another
machine
Device certificate for S/
MIMEof another machine
Device certificate for S/
MIMEof the machine
Computer The machine Device certificate for S/
MIMEof the machine
Personal certificate of
thecomputer
Another machine Device certificate for S/
MIMEof the machine
Device certificate for S/
MIMEof another machine