1,667 research outputs found
Significance of Data Structures and Data Retrieval Techniques on Sequence Rule Mining Efficacy
Sequence mining intends to discover rules from diverse datasets by implementing Rule Mining Algorithms with efficient data structures and data retrieval techniques. Traditional algorithms struggle in handling variable support measures which may involve repeated reconstruction of the underlying data structures with changing thresholds. To address these issues the premiere Sequence Mining Algorithm, AprioriAll is implemented against an Educational and a Financial Dataset, using the HASH and the TRIE data structures with scan reduction techniques. Primary idea is to study the impact of data structures and retrieval techniques on the rule mining process in handling diverse datasets. Performance Evaluation Matrices- Support, Confidence and Lifts are considered for testing the efficacies of the algorithm in terms of memory requirements and execution time complexities. Results unveil the excellence of Hashing in tree construction time and memory overhead for fixed sets of pre-defined support thresholds. Whereas, TRIE may avoid reconstruction and is capable of handling dynamic support thresholds, leading to shorter rule discovery time but higher memory consumption. This study highlights the effectiveness of Hash and TRIE data structures considering the dataset characteristics during rule mining. It underscores the importance of appropriate data structures based on dataset features, scanning techniques, and user-defined parameters
The coexistence between Blockchain and GDPR
The constant evolution of technology sometimes cannot avoid conflict with the parallel evolution of surrounding regulations and legislation. This dissertation highlights the Blockchain architectural design and its inherent and apparent incompatibility with the standing European directives concerning General Data Protection Regulation (GDPR) thanks to one of its most prominent features - immutability. As Blockchain-based solutions emerge and their adoption increases, the concerns about current regulation regarding storage of personal data and the conciliation with the Blockchainās model arises. As a consequence, this research aims to find out a practical way of making Blockchains compatible with GDPR and providing a solution, with the elaboration of a Proof of Concept, along with interviews to experts of Blockchain and GDPRās fields with the purpose of obtaining results and drawing conclusions.A constante evoluĆ§Ć£o que categoriza a tecnologia nĆ£o pode, por vezes, evitar conflitos com a evoluĆ§Ć£o paralela de regulamentos e de legislaƧƵes envolventes. Esta dissertaĆ§Ć£o destaca a discrepĆ¢ncia entre a arquitetura inerente dos sistemas de Blockchain e a sua incompatibilidade aparente e inerente Ć s diretrizes europeias assentes sobre o Regulamento Geral de ProteĆ§Ć£o de Dados, graƧas a uma das suas caracterĆsticas mais importantes ā imutabilidade. Ć medida que as soluƧƵes baseadas em Blockchain surgem e a sua adopĆ§Ć£o aumenta, surgem preocupaƧƵes sobre a regulamentaĆ§Ć£o atual em relaĆ§Ć£o ao armazenamento de dados pessoais e a conciliaĆ§Ć£o com o modelo da Blockchain. Consequentemente, esta pesquisa tem como objectivo descobrir uma maneira prĆ”tica de tornar a tecnologia Blockchain compatĆvel com o Regulamento Geral de ProteĆ§Ć£o de Dados e fornecer uma soluĆ§Ć£o atravĆ©s da elaboraĆ§Ć£o de uma Prova de Conceito, alĆ©m de entrevistas com especialistas das Ć”reas de Blockchain e Regulamento Geral de ProteĆ§Ć£o de Dados com o objetivo de obter resultados e tirar conclusƵes
Literature Review on Secure Mining of Association Rules in Horizontally Distributed Databases
Data and knowledge Engineering is one of the area under data mining. Which can extract important knowledge from large database, but sometimes these database are divided among various parties. This paper addresses a fast distributed mining of association rules over horizontally distributed data. This paper presents different methods for secure mining of association rules in horizontally distributed databases. The main aim of this paper is protocol for secure mining of association rules in horizontally distributed databases. The current main protocol is that of Kantarcioglu and Clifton. This protocol, like theirs, is based on the Fast Distributed Mining (FDM) algorithm of Cheung et al., which is an unsecured distributed version of the Apriori algorithm. The main components in this protocol are two novel secure multi-party algorithms ā one that computes the union of private subsets that each of the interacting players hold, and another that tests the inclusion of an element held by one player in a subset held by another. This protocol offers improved privacy with respect to the protocol in. In addition, it is simpler and is significantly more efficient in terms of communication rounds, communication cost and computational cost
ANCHOR: logically-centralized security for Software-Defined Networks
While the centralization of SDN brought advantages such as a faster pace of
innovation, it also disrupted some of the natural defenses of traditional
architectures against different threats. The literature on SDN has mostly been
concerned with the functional side, despite some specific works concerning
non-functional properties like 'security' or 'dependability'. Though addressing
the latter in an ad-hoc, piecemeal way, may work, it will most likely lead to
efficiency and effectiveness problems. We claim that the enforcement of
non-functional properties as a pillar of SDN robustness calls for a systemic
approach. As a general concept, we propose ANCHOR, a subsystem architecture
that promotes the logical centralization of non-functional properties. To show
the effectiveness of the concept, we focus on 'security' in this paper: we
identify the current security gaps in SDNs and we populate the architecture
middleware with the appropriate security mechanisms, in a global and consistent
manner. Essential security mechanisms provided by anchor include reliable
entropy and resilient pseudo-random generators, and protocols for secure
registration and association of SDN devices. We claim and justify in the paper
that centralizing such mechanisms is key for their effectiveness, by allowing
us to: define and enforce global policies for those properties; reduce the
complexity of controllers and forwarding devices; ensure higher levels of
robustness for critical services; foster interoperability of the non-functional
property enforcement mechanisms; and promote the security and resilience of the
architecture itself. We discuss design and implementation aspects, and we prove
and evaluate our algorithms and mechanisms, including the formalisation of the
main protocols and the verification of their core security properties using the
Tamarin prover.Comment: 42 pages, 4 figures, 3 tables, 5 algorithms, 139 reference
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