İlişkisel veri tabanlarında XML veriler için Homoglif dönüşüm tabanlı damgalama

Yıl 2019, Cilt: 25 Sayı: 5, 586 - 595, 21.10.2019

Mustafa Bilgehan İmamoğlu , Mustafa Ulutaş

Öz

Bilgi Teknolojilerindeki
hızlı gelişim son zamanlarda İnternet üzerinden veri paylaşımını
kolaylaştırmıştır. Dijital verilerin izinsiz olarak kopyalanması veya
değiştirilmesi telif hakkı koruma sorununu beraberinde getirmiştir. Kriptografi
hassas bilgileri güvenli bir şekilde paylaşmak için kullanılsa bile şifrelenmiş
bilgiler orijinal veri ile ilişkilendirilemediğinden telif hakkı koruma
sürecinde kullanılamazlar. Dijital haklar yönetiminde son zamanlarda sayısal
damgalama yöntemleri kullanılmaktadır. Özel hazırlanmış gizli bilgileri veya
damgayı sayısal ortama gizleme yöntemleri verilerin korunmasında ve sahiplik
bilgilerinin belirlenmesinde ek güvenlik mekanizması sağlamaktadırlar. Çoklu
ortam dosyalarındaki hak yönetimi için önerilen algoritmalar, veri tabanları
üzerinde doğrudan uygulanamamaktadır. Veri tabanı damgalama için kullanılan
yöntemlerden bazıları, ilişkide yer alan XML veri alanlarından
faydalanmaktadır. Bu çalışmada XML alanlar üzerinde Homoglif Dönüşüm tabanlı
yeni bir algoritma önerilmektedir. Birincil anahtar ve özüt fonksiyonu veri tabanında
damgalanacak satırların seçiminde kullanılmıştır. Sonuçlar, önerilen yöntemin
literatürdeki diğer yöntemlerle karşılaştırıldığında yüksek damgalama
kapasitesinde çeşitli ataklara karşı iyileştirilmiş sağlamlık elde ettiğini
göstermektedir.

Anahtar Kelimeler

Sayısal damgalama, Veri tabanı damgalama, Homoglif, XML

Homoglyph transformation based watermarking for XML data in relational databases

Öz

Rapid developments in
Information Technologies have eased data sharing through the Internet recently.
Copying or modification of digital data without permission and sharing by
unauthorized users have brought copyright protection problem. Even though
cryptography can be used to share sensitive information securely, it cannot be
used to protect copyright since encrypted information cannot be associated with
the original. Digital watermarking methods are used lately in digital rights
management. Methods to hide specially crafted secret information or watermark
into digital media provide additional security mechanism in protecting the data
and determining the ownership information. Algorithms recommended for right
management in multimedia files cannot be applied directly on databases. Some
methods used for watermarking databases take advantage of Extensible Markup
Language (XML) data fields attached. A new method based on Homoglyph
Transformation in XML fields is proposed in this manuscript. Primary key and
hash algorithm are used together in the selection of lines to be watermarked in
the database. Results indicate improved robustness against various attacks in
high watermarking capacity by the proposed method compared to other methods
reported in the literature.

Anahtar Kelimeler

Digital watermarking, Database watermarking, Homoglyph, XML

Kaynakça

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