Make sure that planning and testing of security measures account for users that roam. One is the loneliest number . No single security solution is likely to address all security risks. Be prepared to implement multiple approaches to completely secure wireless application access. For many, the perception exists that viruses are the primary or only security threat in the wireless world.
Viruses are a real threat, but only half of the problem.
Sending data in the clear that should be encrypted, and allowing user access without authentication pose even greater security threats. A wireless security plan should address all of these exposures. One size doesn't fit all . Different levels of security are needed for different mobile services. Secure chatting services probably don't require the same robust encryption you would implement for a commerce transaction.