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Priority claimed from US12/349,984external-prioritypatent/US8238811B2/en
Application filed by Apple Inc.filedCriticalApple Inc.
Publication of HK1139482A1publicationCriticalpatent/HK1139482A1/en
Publication of HK1139482BpublicationCriticalpatent/HK1139482B/en
An authentication controller 180 coupled to a first communication port of a portable media device 102 is allowed to provide authentication on behalf of an accessory device 112 coupled to a second communication port of the portable media device. A cross transport connector 106 may include a connector to couple with an accessory and a connector 108 to couple with a portable media device such that the accessory can be coupled to the second communication port of the portable media device. The cross-transport connector 106 also includes an authentication controller 180. The authentication controller may request authentication from the medica device over the first communication port of the portable media device. The request may also include an identifier of the second port, to which authenticated permissions obtained via the first port may be transferred. The ports may be 30-pin connectors, USBs, serial, uart, firewire or wireless ports. The method may use a random number encrypted using a private key.