Abstract: The recent of network technology that can support user mobility has prompted anonymous requirement. We describe an efficient anonymous channel protocol for large scale area in wireless communications. The e-service is expected that in the near future, portable communications systems will provide many applications in e-commerce. However on large scale area, the transaction data and handoff events are very large. Our mobile user uses anonymous channel ticket without connecting to home domain meanwhile visit domain authentication mobile user without any information form home domain, so our method suits for large scale area. We can reduce the computational cost in the anonymous channel ticket authentication phase.