Nokia N75 - Security

Tool

s

93

PIN code

,

PIN2 code

, and

Lock code

—You can change the

lock code, PIN code, and PIN2 code. These codes can only
include the numbers from 0 to 9. If you forget any of these
codes, contact your service provider. See "Glossary of PIN
and lock codes," p. 93.

Avoid using access codes similar to the emergency numbers
to prevent accidental dialing of the emergency number.

Autolock period

—You can set an autolock period, a

time-out after which the device automatically locks.
To turn off the autolock period, select

None

.

To unlock the device, enter the lock code.

When the device is locked, calls still may be possible to the
official emergency number programmed into your device.

Tip! To lock the device manually, press

. A list of

commands opens. Select

Lock phone

.

Lock if SIM changed

—You can set the device to ask for

the lock code when an unknown SIM is inserted into your
device. The device maintains a list of SIM cards that are
recognized as the owner’s cards.

Closed user group

—You can specify a group of people to

whom you can call and who can call you (network service).

When calls are limited to closed user groups, calls may be
possible to the official emergency number programmed
into your device.

Confirm SIM services

—You can set the device to display

confirmation messages when you are using a SIM service
(network service).

Glossary of PIN and lock codes

If you forget any of these codes, contact your service provider.

The personal identification number (PIN) code—protects
your SIM card against unauthorized use. The PIN code (4 to
8 digits) is usually supplied with the SIM card. After three
consecutive incorrect PIN code entries, the code is blocked,
and you need the PUK code to unblock it.

The UPIN code—may be supplied with the USIM card. The
The USIM card is an enhanced version of the SIM card and
is supported by UMTS mobile phones.

The PIN2 code—(4 to 8 digits) is supplied with some SIM cards,
and is required to access some functions in your device.

The lock code (also known as security code)—(5 digits) can
be used to lock the device to avoid unauthorized use.
The factory setting for the lock code is 12345. To avoid
unauthorized use of your device, change the lock code. Keep
the new code secret and in a safe place separate from your
device. If you forget the code, contact your service provider.

The personal unblocking key (PUK) code and PUK2 code
(8 digits) are required to change a blocked PIN code or
PIN2 code, respectively. If the codes are not supplied with
the SIM card, contact the operator whose SIM card is in
your device.

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The UPUK code—(8 digits) is required to change a blocked
UPIN code. If the code is not supplied with the USIM card,
contact the operator whose USIM card is in your device.

Certif. management

Digital certificates do not guarantee safety; they are used
to verify the origin of software.

In the certificate management main view, you can see a
list of authority certificates that are stored in your device.
Press

to see a list of personal certificates, if available.

Digital certificates should be used if you want to connect to
an online bank or another site or remote server for actions
that involve transferring confidential information. They
should also be used if you want to reduce the risk of viruses
or other malicious software and be sure of the authenticity
of software when downloading and installing software.

Important: Even if the use of certificates makes the
risks involved in remote connections and software
installation considerably smaller, they must be used
correctly in order to benefit from increased security.
The existence of a certificate does not offer any
protection by itself; the certificate manager must
contain correct, authentic, or trusted certificates
for increased security to be available. Certificates
have a restricted lifetime. If Expired certificate or
Certificate not valid yet is shown even if the
certificate should be valid, check that the current
date and time in your device are correct.

View certificate details—check authenticity

You can only be sure of the correct identity of a server
when the signature and the period of validity of a server
certificate have been checked.

You are notified if the identity of the server is not
authentic or if you do not have the correct security
certificate in your device.

To check certificate details, scroll to a certificate, and
select

Options

>

Certificate details

. When you open

certificate details, the validity of the certificate is checked,
and one of the following notes may be displayed:

Certificate not trusted

—You have not set any application

to use the certificate. See "Change the trust settings," p. 94.

Expired certificate

—The period of validity has ended for

the selected certificate.

Certificate not valid yet

—The period of validity has not

yet begun for the selected certificate.

Certificate corrupted

—The certificate cannot be used.

Contact the certificate issuer.

Change the trust settings

Before changing any certificate settings, you must make
sure that you really trust the owner of the certificate and
that the certificate really belongs to the listed owner.

Scroll to an authority certificate, and select

Options

>

Trust settings

. Depending on the certificate, a list of the

applications that can use the selected certificate is shown.

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