| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for enabling a recipient to rely on the fact that the source address of a data packet indicates a true sender of the packet, and an apparatus for implementing the method. SOLUTION: In a packet radio network, a packet data address is activated for a terminal for transmitting data packets between the terminal and an external network. Information on the activated packet data address is stored in the edge nodes of the network. To prevent spoofing, i.e., misrepresentation of sender data, in the node, it is checked whether the source address of the packet transmitted from the terminal is the same as the packet data address used in the transmission of the packet or does the source address belong to a list of allowed packet data addresses. The packet is transmitted from the node towards the destination address only if the addresses are identical or the source address belongs to the list of allowed packet data addresses. COPYRIGHT: (C)2008,JPO&INPIT
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