| 摘要 |
A computer system (44), useful for personal digital assistant (PDA) and mobile phone m-commerce and e-commerce and other similar applications, includes a processor (46) adapted to activate first and second security levels for the system. The system also comprises a plurality of exception handlers (92, 94, 96), each exception handler executed by the processor and associated with one of the security levels. A first exception handler (92) associated with the first security level receives an exception and forwards the exception to a second exception handler 94 associated with the second security level for service. The second exception handler either services the exception or forwards the exception to a third exception handler (96) according to a security level of the exception.
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