Nokia 3108 User Manual download pdf (Page 78)

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• User certificates are issued to

users by a Certifying Authority.

User certificates are required, for

example, to make a digital

signature and they associate the

user with a specific private key in

a security module.

Important: Note, however,

that 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.

Important: 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 phone

are correct.

Important: Before changing these

settings, you must make sure that

you really trust the owner of the

certificate and that the certificate

really belongs to the listed owner.

Digital signature

You can make digital signatures with

your phone (network service). The

signature can be traced back to you

via the private key on the security

module and the user certificate that

was used to perform the signature.

Using the digital signature can be

the same as signing your name to a

paper bill, contract or other

document.

To make a digital signature, select a

link on a page, for example, the title

of the book you want to buy and its

price. The text to sign (possibly

including amount, date, etc.) will be

shown.

Check that the header text is Read

and that the digital signature icon

is shown.

Note: If the digital signature

icon does not appear, there

is a security breach, and you

should not enter any

personal data such as your

signing PIN.

To sign the text, read all of the text

first and then you can select Sign.

Note: The text may not fit

within a single screen.

Therefore, make sure to

scroll through and read all

of the text before signing.

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