Sony T300 - Manual (Page 44)

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46 Setting up mobile Internet
To enter the access PIN (for the security module)
and the signature PIN
• Scroll to WAP Services, YES , Options, YES , Common,
YES , Security, YES , Locks.
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 WAP Services/Options/Common/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:
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 options 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 Sony Ericsson Mobile Internet or
other WAP pages.
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
1. Scroll to WAP Services, YES , Options, YES , Common,
YES , Security, YES .
2. Select Trusted certif. or Client certif.