Ricoh 917F Operating Instructions Manual page 1430

4. Using the shared key, encrypt the e-mail message.
5. The shared key is encrypted using the user's public key.
6. The encrypted e-mail is sent.
7. The receiver decrypts the shared key using a secret key that corresponds to the public key.
8. The e-mail is decrypted using the shared key.
• There are three types of user certificates that can be installed on this machine, "DER encoded binary
X.509", "Base 64 encoded X.509", and "PKCS #7 certificate".
• When installing a user certificate to the Address Book using Web Image Monitor, you might see an
error message if the certificate file contains more than one certificate. If this error message appears,
install the certificates one at a time.
Specifying the User Certificate
This can be specified by the user administrator. Each user certificate must be prepared in advance.
1. Open a Web browser.
2. Enter "http://(the machine's IP address or host name)/" in the address bar.
When entering an IPv4 address, do not begin segments with zeros. For example: If the address is
"192.168.001.010", you must enter it as "192.168.1.10" to connect to the machine.
The top page of Web Image Monitor appears.
3. Click [Login].
The user administrator can log on.
Enter the login user name and login password.
4. Click [Address Book].
The Address Book page appears.
5. Select the user for whom the certificate will be installed, and then click [Change].
The Change User Information screen appears.
6. Enter the user address in the "E-mail Address" field under "E-mail".
7. Click [Change] in "User Certificate".
8. Click [Browse], select the user certificate file, and then click [Open].
9. Click [OK].
The user certificate is installed.
10. Click [OK].
11. Click [Logout].
Using S/MIME to Protect E-mail Transmission
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