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    probablistic packet marking for large scale IP traceback


    by parameshwaran_mca ·

    hi to one and all,
    i got this abstract from the net and the amazing thing is this is the project tat i gonna develop in c#.. so i couldn’t get the concept from the abstract so any one can help me please…
    In this paper, we model Probabilistic Packet Marking (PPM) schemes for IP traceback as an identification problem of a large number of markers. Each potential marker is associated with a distribution on tags, which are short binary strings. To mark a packet, a marker follows its associated distribution in choosing the tag to write in the IP header. Since there are a large number of (for example, over 4,000) markers, what the victim receives are samples from a mixture of distributions. Essentially, traceback aims to identify individual distribution contributing to the mixture. Guided by this model, we propose Random Packet Marking (RPM), a scheme that uses a simple but effective approach. RPM does not require sophisticated structure/relationship among the tags, and employs a hop-by-hop reconstruction similar to AMS [16]. Simulations show improved scalability and traceback accuracy over prior works. For example, in a large network with over 100K nodes, 4,650 markers induce 63% of false positives in terms of edges identification using the AMS marking scheme; while RPM lowers it to 2%. The effectiveness of RPM demonstrates that with prior knowledge of neighboring nodes, a simple and properly designed marking scheme suffices in identifying large number of markers with high accuracy.

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