Konica Minolta bizhub C550 bizhub C451/C550 Security Operations User Manual - Page 95
Setting the S/MIME Communication
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2 2.14 2.14.1 Administrator Operations S/MIME Communication Setting Function When access to the Administrator of the machine by the Administrator Settings is authenticated, the machine enables the setting of encryption of text of e-mail transmitted and received between the PC and the machine. Setting the S/MIME Communication 2 Note Do not leave the machine with the setting screen of Administrator Settings left shown on the display. If it is absolutely necessary to leave the machine, be sure first to log off from the Administrator Settings. To send S/MIME communications, it becomes necessary to register the certificate at the destination. Set 1024 bits or more for the key length of the RSA public key for the certificate of each destination. [NO] should be selected for [Automatically Obtain Certificates], so that no certificates are registered through automatic acquisition. For registration of certificates, see "Registering the certificate" on page 2-85. For encryption strength, select the strong "3DES," "AES- 128," "AES- 192," or "AES- 256." If the mail software being used does not support AES, encrypted mail messages may be received, but they cannot be decrypted. Use AES-compliant mail software or select the encryption strength that is the strongest of all compliant with the currently used mail software. ! Detail Each encryption strength code represents the following. Name : encryption algorithm : encryption key length 3DES : 3 key triple DES : 168 bits AES- 128 : AES : 128bit AES- 192 : AES : 192bit AES- 256 : AES : 256bit 0 For the procedure to call the Administrator Settings to the display, see "Accessing the Administrator Settings" on page 2-2. 1 Call the Administrator Settings to the screen from the control panel. 2 Touch [Network Settings]. 2-80 C550/C451