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)
