M. Hatzopoulos, D. Gouscos, M. Spiliopoulou, C. Vassilakis and M. Vazirgiannis
in Proceedings of the DELTA Conference in Research and Development, pp. 483-493, The Hague, October 1990.

Abstract
Our main objective is the definition of a design model for a hypermedia database, dedicated to accomodating multimedia information and to promote navigation as a means of information processing. We prefered the object-oriented paradigm to the relational one, because it provides generic modelling constructs and supports property inheritance. We observe the hyperbase as a network of items and links, where items contain multimedia information and links represent the relationship among them. So, we define a class hierarchy containing both the information pieces and the interconnections among them as objects in the same level of functionality. In this environment, we support typed and weighted links to enhance the declaration of semantic relationships, and keywords to allow for querying as an alternative tool for information processing.

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Nicholas Kolokotronis, Sotirios Brotsis, Georgios Germanos, Costas Vassilakis and Stavros Shiaeles
1st IEEE Services Workshop on Cyber Security and Resilience in the Internet Of Things within IEEE Services 2019, 2019, Milan, Italy. Abstract:
This paper considers the use of novel technologies for mitigating attacks that aim at compromising intrusion detection systems (IDSs). Solutions based on collaborative intrusion detection networks (CIDNs) could increase the resilience against such attacks as they allow IDS nodes to gain knowledge from each other by sharing information. However, despite the vast research in this area, trust management issues still pose significant challenges and recent works investigate whether these could be addressed by relying on blockchain and related distributed ledger technologies. Towards that direction, the paper proposes the use of a trust-based blockchain in CIDNs, referred to as trust-chain, to protect the integrity of the information shared among the CIDN peers, enhance their accountability, and secure their collaboration by thwarting insider attacks. A consensus protocol is proposed for CIDNs, which is a combination of a proof-of-stake and proof-of-work protocols, to enable collaborative IDS nodes to maintain a reliable and tampered-resistant trust-chain.

Note: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.