Sony Ericsson T618 User Manual page 69

Digital signatures
You can sign a contract with your phone by entering
a digital signature PIN as if signing with a pen on
paper. Digital signature records can be traced back to
your private key through a certificate that is used for
signing a contract.
All transactions (signed contracts) made with your
phone when browsing are stored in your phone.
To check your contracts
• Scroll to Connectivity, WAP options,
Security, Contracts.
Trusted certificates and Client certificates
To establish a secure connection when using certain
WAP services, for example banking or WAP
shopping, you need certificates in your phone.
• The different types of certificates are as follows:
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1. Server certificates are used to identify a WAP
gateway to the phone and to show that it is certified
by a trusted authority. The server certificate is
checked against trusted certificates that are stored in
the phone or in a security module. If the phone
cannot verify the identity of a server, you are given
the option to terminate or continue the connection.
2. Trusted certificates are used to verify the WAP
gateway that you are trying to connect to. Your
phone may already contain trusted certificates when
you buy it. If you have a security module, it may also
contain trusted certificates. You can also download
trusted certificates from www.SonyEricsson.com.cn.
3. Client certificates are located in a security module
together with your private keys. Client certificates
can be used to present your identity to a bank or
other services. They can also be used for
digital signatures.
To check the certificates in your phone
• Scroll to Connectivity, WAP options, Security,
Client certificates.
Setting up WAP and e-mail 69