Konica Minolta BIZHUP C451 - Manual (Page 357)

Various settings 9
C451 9-46
4
If “User-Defined” was selected, enter 20 characters for the encryption
password, and then touch [OK].
– Consecutive encryption passwords with the same characters are
invalid.
5
Reenter the encryption password, and then touch [OK].
The encryption password is specified.