Ontoloji Tabanlı Erişim Denetimi: Ontoloji Tabanlı Veri Erişimi yoluyla Bir Durum Çalışması

Öz

Ontoloji Tabanlı Veri Erişimi (OBDA), bir ontoloji ile bir veri kaynağı arasında kurulan eşleme sonucunda veri erişiminin ve veri entegrasyonunun sağlanmasıdır. Böylece, Anlamsal Web teknolojileri kullanılarak büyük miktarda verinin depolanması kolaylaşmakta, daha güçlü sorgular yazılabilmekte ve karmaşık bilgi sistemlerinin yönetimi hızlı ve etkin bir şekilde yapılabilmektedir. Ontoloji Tabanlı Erişim Denetimi (OBAC), Anlamsal Web teknolojilerini kullanarak erişim denetim düzeneklerinin uygulanmasını sağlamaktadır. Bu nedenle, veri mahremiyetini korumak için yalnızca yetkilendirilmiş kişiler verilere erişebilmektedir. Bu çalışmada, veri modelinden bağımsız bir erişim denetim yaklaşımı ile veri sanallaştırmayı sağlarken güvenliği artırmak için OBDA ve OBAC entegre edilmiştir. Bu amaçla, sağlık alanı için bir durum çalışması sunulmuştur. Böylelikle, hastane alanı için ilişkisel bir veri tabanı, ilgili hastane veri tabanı için bir Hastane Ontolojisi ve bir erişim denetim politikası oluşturulmaktadır. Ayrıca, hastane veri tabanı ile Hastane Ontolojisi arasındaki ilgili eşleştirmeler Ontop çerçevesi kullanılarak oluşturulmakta ve son olarak, eşleştirmeleri ve erişim kurallarını değerlendirmek için Ontop SPARQL kullanılarak çeşitli sorgular yürütülmektedir.

Anahtar Kelimeler

• Erişim Denetim
• Veri Erişimi
• Mahremiyet
• Ontolji
• Anlamsal Web
• Bilgi Mühendisliği

Ontology Based Access Control: A Case Study through Ontology Based Data Access

Öz

Ontology Based Data Access (OBDA) is the provision of data access and data integration as a result of the mapping that is established between an ontology and a data source. Thus, storing large amounts of data becomes easier, more powerful queries can be written, and management of complex information systems can be performed quickly and effectively by using Semantic Web technologies. Ontology Based Access Control (OBAC) uses Semantic Web technologies to enable the enforcement of access control mechanism. Therefore, only authorized persons can access data to protect data privacy. In this study, OBDA and OBAC are integrated to improve security while providing data virtualization with a data model-independent access control approach. Therefore, a use case study for the healthcare domain is presented. Hence, a relational database for the hospital domain, a Hospital Ontology for the related hospital database and an access control policy are created. Also, the relevant mappings between the hospital database and the Hospital Ontology are established by using the Ontop framework and finally, various queries are executed by using Ontop SPARQL to evaluate mappings and access rules.

Anahtar Kelimeler

• Access Control
• Data Access
• Privacy
• Ontology
• Semantic Web
• Knowledge Engineering

Kaynakça

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