Abstract: In wireless mobile network, during handoff technique, authentication is required in order to transfer the information in secured way. Hence, in this study, we propose a privacy preserving handoff authentication protocol for wireless mobile networks. In this protocol, Attribute Based Signature (ABS) is applied for handoff authentication between the mobile node (UE) and the BS. The attributes considered are pseudo id of the UE, time slot and location information. Whenever, the UE decides to handoff to a selected BS it signs the message using its attribute List L and the Secret Key (SK) and transmit to BS. The BS verifies the signature and generates a blind signature which is transmitted to the UE. UE verifies the blind signature and creates the Session Key (SK) for that slot. By simulation results, we show that the proposed technique enhances the network security.