Author

Kalin Kopanov

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Open access Aug 2026

Time-Series and Social-Media Threat Analytics over a Deployed Cyber-Threat Knowledge Graph

EdgeGuard, a deployed cyber-threat knowledge graph that merges eleven public threat feeds into one Neo4j database via MISP and the STIX 2.1 exchange format, is measured, showing that half of the vulnerabilities known to have been exploited were listed as exploited within five days of their publication, and that a large ingestion spike in early 2026 came from a single feed rather than a real attack wave.

Kalin Kopanov, K. Dineva, Ivaylo Keremidarski et al. · Information · 0 citations

Open access Jul 2026

Profile-Free Behavioral Characterization of Bot-like Activity in a Political Reply Ecosystem on X: A Case Study

In a case study of the reply ecosystem of an official political party account, compute profile-free behavioral features covering text duplication, character-level entropy, timing regularity, reply latency, and post coverage, complemented by a co-commenting network analysis, and group active accounts with unsupervised density-based clustering.

Kalin Kopanov, Tatiana V. Atanasova · Information · 0 citations