White Paper J200
To use such secure connections, certificates have to be saved in the phone. The J200 comes with a number of
WTLS class 2 includes the following security fea- tures:
•Encryption of a message, ensuring that only the sender and the recipient can read the contents of a message.
•Server authentication, meaning that the mes- sage is encrypted and users can verify that they really are communicating with the WAP gateway they believe they are connected to.
Configuration of WAP settings
An easy way to perform the WAP configuration of a single phone is by using the Sony Ericsson step-
A manual configuration is made using the menu system in the phone. This is described in the user guide.
To simplify configuration of WAP settings in a number of phones, all settings can be sent as an SMS message to each phone. This makes it easy for an operator, a service provider or a company to distribute settings for Internet/intranet, and WAP, without having to configure each phone manually.
•The OTA configuration message is distributed via SMS
•The setup information is a binary encoded XML message, according to WBXML. To receive information about OTA specifications, please contact your local Sony Ericsson representative for consumer products.
•The user is not alerted about new settings until the ongoing browsing session ends. Further- more, settings are not changed during an ongo- ing browsing session.
•The necessary user interaction is limited to receiving and accepting/rejecting the configura- tion message, and selecting the WAP profile to allocate the settings to.
•Security can be handled using a keyword identi- fier displayed on the screen as a shared secret between the SMS sender and recipient. It is important that the user can verify that the con- figuration message is authentic.
Push services
These are useful for sending updated WAP site contents or WAP links to mobile users. Examples of services that can be implemented using push services:
•Notification of new voice mails. Instant messag- ing and chat.
•News, sport results, weather forecasts, financial information (such as stock quotes).
•Fill up a smart card with
•Interactive games, for example, play poker with a friend.
In the J200, the user selects whether to allow push messages or not. There are two different forms of Push services:
Service Indication (SI)
This is basically a text message to the user con- taining a link to a URL carried by the SI. If the user decides to load the suggested URL, normal WAP browsing commences.
Service Loading (SL)
This means that the WAP site content is immedi- ately loaded and executed on the client, or alterna- tively is loaded and stored in the cache for later use. In both cases, the SL is loaded without any user intervention.
When a service indication is received in the J200, it is presented to the user in one of the following ways:
14 | November 2004 |