| 摘要 |
A conditional access system comprising a plurality of devices interconnected in a network, the devices being grouped in a first group and a second group, the devices of the first group operating in accordance with a first security framework and the devices of the second group operating in accordance with a second security framework, each device operating using a particular middleware layer, said middleware layer being arranged to authenticate another middleware layer of another device, said middleware layer being authenticated by the security framework in accordance with which the device operates.
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