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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. 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 that 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.