How a BlackBerry device protects a connection to a WAP gateway
BlackBerry® Device Software versions 3.2 SP1 and later supports WTLS, which is designed to provide additional security when a BlackBerry device connects to a WAP gateway. A BlackBerry device can connect to a WAP gateway to access services that are provided by your organization's wireless service provider or to access a web site. WTLS encrypts and decrypts information, authenticates users, and provides data integrity.
For more information about WAP gateways, see your organization’s wireless service provider.