Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New software improves database security

11.11.2004


Penn State researchers have developed software that more quickly and efficiently ensures that databases don’t release unauthorized information.



The software, QFilter, "sits" between users and databases and filters or culls out unauthorized requests for data before a database responds to a query. "We have shifted the thinking from data filtering to query filtering," said Dongwon Lee, assistant professor in the School of Information Sciences and Technology (IST). "This is a practical solution to the ongoing problem of database access controls."

Businesses and organizations know a critical security guarantee for their databases is that only authorized users can access approved data. That security is managed currently through access control-modules built separately into individual databases. QFilter can implement database security without those modules. This means it can be used with off-the-shelf databases and without requiring substantial changes to existing databases, the researchers said. "That difference not only makes the security check of QFilter very practical, but it also significantly improves query-response time by rejecting unauthorized requests early on," Lee said.


The technology is discussed in a paper titled "QFilter: Fine-Grained Run-Time XML Access Control via NFA-based Query Rewriting" presented today (Nov. 11) at the ACM Conference on Information and Knowledge Management in Washington, D.C. Lee’s co-authors are Bo Luo, an IST doctoral student; Peng Liu, an assistant professor of information sciences and technology in IST; and Wang-Chien Lee, an associate professor in the department of Computer Science and Engineering.

Other technologies for restricting access to databases exist. One popular technique is view-based technology which creates different data views for each user. Once the views are created, the database no longer has to check users’ credentials, so there is a speed advantage. But as the number of users requesting access grows or views need to be updated frequently, this technology will have maintenance and storage issues, the researchers said. "The issues are what technology is the fastest, what requires the least storage and what requires the least amount of changes to existing databases," Lee said. "Compared to competing techniques, QFilter is better on all three."

To capture and determine who can access what information, QFilter uses a specialized model of computation known as non-deterministic finite automata (NFA). NFA stores a large number of access control policies in an efficient and non-redundant fashion. NFA monitors when users’ queries pass through and filters out parts of queries asking for unauthorized access.

Work on QFilter continues as the software is not in its final version, said Lee who anticipates developing other applications for QFilter.

Margaret Hopkins | EurekAlert!
Further information:
http://www.psu.edu

More articles from Information Technology:

nachricht Smarter robot vacuum cleaners for automated office cleaning
15.08.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

nachricht Researchers 3-D print first truly microfluidic 'lab on a chipl devices
15.08.2017 | Brigham Young University

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

Im Focus: Scientists improve forecast of increasing hazard on Ecuadorian volcano

Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).

The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

New thruster design increases efficiency for future spaceflight

16.08.2017 | Physics and Astronomy

Transporting spin: A graphene and boron nitride heterostructure creates large spin signals

16.08.2017 | Materials Sciences

A new method for the 3-D printing of living tissues

16.08.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>