A persistent public watermarking of relational databases

Authors:
Raju Halder;Agostino Cortesi
Affiliations:
Dipartimento di Informatica, Università Ca' Foscari di Venezia, Italy;Dipartimento di Informatica, Università Ca' Foscari di Venezia, Italy
Venue:
ICISS'10 Proceedings of the 6th international conference on Information systems security
Year:
2010

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Abstract

In this paper, we propose a novel fragile and robust persistent watermarking scheme for relational databases that embeds both private and public watermarks where the former allows the owner to prove his ownership, while the latter allows any end-user to verify the correctness and originality of the data in the database without loss of strength and security. The public watermarking is based on a part of the database state which remains invariant under processing of the queries associated with the database, whereas the private watermarking is based on an appropriate form of the original database state, called abstract database, and the semantics-based properties of the data which remain invariant under processing of the associated queries.