Security issues involved with mobile applications are about the same as with any other applications. If the application is a standalone application with no connections to the outer world, securing it is relatively easy. But if the application is networked, it takes same time and planning to make sure that the whole system is secure enough for the system's requirements.
Every system developer, architect, or manager should know same basic details about security, its effects, and developing secure systems. There are many interesting Web links and books for you to discover.