Nokia 7380 User Manual

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Contents

Nokia 7380 User Manual Manual pdf 52 page image

M e n u f u n c t i o n s51The security icon does not indicate that the data transmission between thegateway and the content server (or place where the requested resource isstored) is secure. The service provider secures the data transmission betweenthe gateway and the content server.• Authority certificates are used by some services, such as banking services, forchecking the validity of other certificates. Authority certificates can either besaved in the security module by the service provider, or they can be downloadedfrom the network, if the service supports the use of authority certificates.• User certificates are issued to users by a certifying authority. User certificatesare required to create a digital signature, and they associate the user with aspecific private key in a security module.Important: Even if the use of certificates makes the risks involved in remoteconnections and software installation considerably smaller, they must beused correctly in order to benefit from increased security. The existenceof a certificate does not offer any protection by itself; the certificatemanager must contain correct, authentic, or trusted certificates forincreased security to be available.Certificates have a restricted lifetime. If Expired certificate or Certificatenot valid yet is shown even if the certificate should be valid, check thatthe current date and time in your device are correct.Before changing any certificate settings, you must make sure that youreally trust the owner of the certificate and that the certificate reallybelongs to the listed owner.Digital signatureYou can make digital signatures with your phone if your SIM card has a securitymodule. The signature can be traced back to you using the private key on thesecurity 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 thebook that you want to buy and its price. The text to sign (for example, amountand date) is 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, then select Sign.