information. They should also be used if you want to reduce the risk of viruses or other malicious software, and to check the authenticity of software when you download and install software to your device.

management

Tip: When you add a new certificate, check its

authenticity.

View certificate details

data

You can only be sure of the correct identity of a server

when the signature and the validity period of a server

and

certificate have been checked.

To view certificate details, select View details.

Security

One of the following notes may appear:

Expired certificate — The period of validity has

 

Certificate not trusted — You have not set any

 

application to use the certificate. You may want to

 

change the trust settings.

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.

Certificate trust settings

Trusting a certificate means that you authorise it to verify web pages, e-mail servers, software packages, and other data. Only trusted certificates can be used to verify services and software.

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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.

To change the trust settings, select a certificate and Options > Trust settings. Select an application field and press the scroll key to select Yes or No. You cannot change the trust settings of a personal certificate. Depending on the certificate, a list of applications that can use the certificate is displayed:

Symbian installation — New Symbian operating system application.

Internet E-mail and graphics.

App. installation — New Java™ application.

Online certif. check — Online certificate status protocol.

Security modules

Select Menu > Tools > Settings > General > Security > Security module.

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Nokia E51 manual Security modules, View certificate details, Certificate trust settings, Data, 104