| 摘要 |
An apparatus and method, utilized by a receiving node in a multicast for authenticating a message received from a transmitting node, uses tags to determine if the transmitting node is in the multicast. More particularly, a first tag received with the message is located and utilized to determine if the tranmsitting node is in the mulicast. The first tag includes data associated with at least one of the receiving node and the transmitting node . A second tag then is generated if the transmitting node is determined to be in the multicast. Once generated, the second tag is transmitted with the messag e to a third node in the multicast. Among other things, the second tag include s data indicating that the receiving node is in the multicast.
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