| 摘要 |
Access of a first device, communicating with a second, portable device, to digital content is controlled by authentication of the first device by a remote server; upon successful authentication of the first device by the remote server, securely providing by the remote server credentials to the portable device, the credentials enabling the portable device to authenticate the first device; securely providing by the remote server rights objects to the portable device, the rights objects comprising usage rights and information which is necessary to access the content; authentication of the first device by the portable device using the credentials received from the rem
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