Users Guide

280 | Encryption and Digital Signature Settings
Configuration of E-mail Encryption/Digital Signature
This section describes how to encrypt e-mails and how to attach a digital signature to
e-mails.
NOTE:
• To encrypt e-mails, a personal or device certificate for S/MIME of a recipient and the device
certificate of the machine must be set on the computer. Configure the following settings to the
certificates:
- "e-mail address"
- If the certificate contains V3 extension "keyUsage", "digitalSignature" and "keyEncipherment"
must be asserted.
- If the certificate contains V3 extension "extendedKeyUsage", "emailProtection" must be set.
• Personal certificates in smart cards can only be used to attach a digital signature to e-mails.
• Up to 100 addresses can be encrypted with S/MIME.
Step 1 Configuration on the Machine
This section describes configuration procedures to set up a certificate with Dell Printer
Configuration Web Tool.
NOTE:
• You cannot use a self-signed certificate created with Dell Printer Configuration Web Tool for
S/MIME.
• The machine supports the capability to import the RSA public key (up to 4096 bits).
Setting up a Certificate using Dell Printer Configuration Web Tool
To configure a certificate using Dell Printer Configuration Web Tool, configure the
encryption settings for HTTP communications, and then import a certificate issued by
another CA to enable S/MIME.
NOTE:
• For details on how to configure the encryption settings for HTTP communication, refer to
"Configuration of HTTP Communications Encryption".
1 Import a certificate.
For details, see "Security Certificates".
NOTE:
• You cannot import a certificate that has been already registered in Device Certificates or Other
Certificates. Delete the registered certificate before importing.
2 Select the certificate in the Security Certificates screen.
3 In the Certificate Details screen, make sure that Category is set to Device
Certificate, and Certificate Use is set to S/MIME.
4 Select Connectivity J S/MIME, and enable S/MIME.
5 Configure the settings for S/MIME.
Step 2 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.