Purdue University Graduate School
Thesis_ShaguftaMehnaz.pdf (2.92 MB)

Fine-Grained Anomaly Detection For In Depth Data Protection

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posted on 2020-06-23, 19:09 authored by Shagufta MehnazShagufta Mehnaz
Data represent a key resource for all organizations we may think of. Thus, it is not surprising that data are the main target of a large variety of attacks. Security vulnerabilities and phishing attacks make it possible for malicious software to steal business or privacy sensitive data and to undermine data availability such as in recent ransomware attacks.Apart from external malicious parties, insider attacks also pose serious threats to organizations with sensitive information, e.g., hospitals with patients’ sensitive information. Access control mechanisms are not always able to prevent insiders from misusing or stealing data as they often have data access permissions. Therefore, comprehensive solutions for data protection require combining access control mechanisms and other security techniques,such as encryption, with techniques for detecting anomalies in data accesses. In this the-sis, we develop fine-grained anomaly detection techniques for ensuring in depth protection of data from malicious software, specifically, ransomware, and from malicious insiders.While anomaly detection techniques are very useful, in many cases the data that is used for anomaly detection are very sensitive, e.g., health data being shared with untrusted service providers for anomaly detection. The owners of such data would not share their sensitive data in plain text with an untrusted service provider and this predicament undoubtedly hinders the desire of these individuals/organizations to become more data-driven. In this thesis, we have also built a privacy-preserving framework for real-time anomaly detection.


Schlumberger Foundation Faculty For The Future Fellowship


Degree Type

  • Doctor of Philosophy


  • Computer Science

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

Elisa Bertino

Additional Committee Member 2

Ninghui Li

Additional Committee Member 3

Mikhail J. Atallah

Additional Committee Member 4

Clifton W. Bingham

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