Abbas Ghaemi Bafghi

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It is important to increase the detection rate for known intrusions and detect unknown intrusions. It is also important to incrementally learn new unknown intrusions. Most current intrusion detection systems employ either misuse detection or anomaly detection. In order to employ these techniques, we propose incremental hybrid intrusion detection system.(More)
— Key management is considered as the fundamental part of any secure communication. A secure wireless sensor network communication protocol relies on an efficient key management system. In sensor networks some random pre-distribution schemes are proposed for key management protocols. Connectivity and resiliency are two important criteria in key management.(More)
As protection of web applications are getting more and more important every day, CAPTCHAs are facing booming attention both by users and designers. Nowadays, it is well accepted that using visual concepts enhance security and usability of CAPTCHAs. There exist few major different ideas for designing image CAPTCHAs. Some methods apply a set of modifications(More)
— Key management is considered as the fundamental part of any secure communication. In previous work, we propose RKPH scheme that was improved based on connectivity and resiliency compared to some other schemes. In this paper, we propose ARKPH, a modified scheme of RKPH that decrease impact of node compromise on sensor network security. In this scheme that(More)