Encryption-Based Multilevel Model for DBMS

Chapter 5

Chapter 5Encryption-Based Multilevel Model For DBMS

Presented by: Ala Eltayeb

Outlines IntroductionEncryption-Based Multilevel Database ModelManipulationPerformance StudyAnalysis of Experimental ResultsSummary

1. Introduction Type of encryption in database? Column &row Encrypt each tuple (row) in the relation (table) with an encryption key that depends on the security level of the tuple (tuple classification).

Encryption-BasedMulti-level Model

Multilevel RelationModel

Encryption System

The Encryption-based multilevel security model Characterizes:Utilizing an encryption system as an additional security layer over the multilevel security layer for the relational database. Reducing the multilevel database size. Improving the response time of data retrieval from the multilevel database.

Cont..The prototype is used as a research tool for studying principles and mechanisms of the encryption-based multilevel model and other multilevel relational database security models (SeaView, JajodiaSandhu, SmithWinslett , multilevel relational [MLR], and belief-consistent models) .

Why used prototype?To determine the relative performance of the multilevel relational database security models.The performance cost for applying the encryption system in multilevel relational database security.

2. Encryption-Based Multilevel Database ModelA symmetric key:-for each unique security level.Theuser can use the keys : Security level (key)