Ricoh C3030 Operating Instructions Manual page 636

Preventing Information Leaks
D
Press [Extended Security].
3
E
Press [On] for "Encrypt Address Book".
F
Press [Change] for [Encryption Key].
G
Enter the encryption key, and then press [OK].
Enter the encryption key using up to 32 alphanumeric characters.
H
Press [Encrypt / Decrypt].
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