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| Content Provider | ACM Digital Library |
|---|---|
| Author | Milajerdi, Sadegh M. Manzoor, Emaad Akoglu, Leman |
| Abstract | Given a stream of heterogeneous graphs containing different types of nodes and edges, how can we spot anomalous ones in real-time while consuming bounded memory? This problem is motivated by and generalizes from its application in security to host-level advanced persistent threat (APT) detection. We propose StreamSpot, a clustering based anomaly detection approach that addresses challenges in two key fronts: (1) heterogeneity, and (2) streaming nature. We introduce a new similarity function for heterogeneous graphs that compares two graphs based on their relative frequency of local substructures, represented as short strings. This function lends itself to a vector representation of a graph, which is (a) fast to compute, and (b) amenable to a sketched version with bounded size that preserves similarity. StreamSpot exhibits desirable properties that a streaming application requires: it is (i) fully-streaming; processing the stream one edge at a time as it arrives, (ii) memory-efficient; requiring constant space for the sketches and the clustering, (iii) fast; taking constant time to update the graph sketches and the cluster summaries that can process over 100,000 edges per second, and (iv) online; scoring and flagging anomalies in real time. Experiments on datasets containing simulated system-call flow graphs from normal browser activity and various attack scenarios (ground truth) show that StreamSpot is high-performance; achieving above 95% detection accuracy with small delay, as well as competitive time and memory usage. |
| Starting Page | 1035 |
| Ending Page | 1044 |
| Page Count | 10 |
| File Format | PDF MP4 |
| ISBN | 9781450342322 |
| DOI | 10.1145/2939672.2939783 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2016-08-13 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Evolving graphs Dynamic networks Typed graphs Graph sketches Temporal networks Heterogenous graphs Streamspot Anomaly detection |
| Content Type | Audio Text |
| Resource Type | Article |
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