Graduation Year

2023

Document Type

Dissertation

Degree

Ph.D.

Degree Name

Doctor of Philosophy (Ph.D.)

Degree Granting Department

Information Systems and Decision Sciences

Major Professor

He Zhang, Ph.D.

Co-Major Professor

Balaji Padmanabhan, Ph.D.

Committee Member

Manish Agrawal, Ph.D.

Committee Member

Sagar Samtani, Ph.D.

Committee Member

Nasir Ghani, Ph.D.

Keywords

Algorithmic Bias, Cybersecurity, EHR Systems, Robust Optimization

Abstract

This dissertation research focuses on two key aspects of cybersecurity research. Security safeguard allocation, and AI-powered tools for anomaly detection. The first dissertation essay (Chapter 1) proposes a novel framework for the allocation of security countermeasures in the presence of uncertainty using robust optimization technique. The second dissertation essay (Chapter 2) studies the impact of algorithmic bias on the practice of insider threat detection in Electronic Health Record Systems and proposes a mitigations strategy. The final dissertation essay (Chapter 3) investigates how the biases of anomaly detection algorithms, and the characteristics of ensemble methods relate to the ensembles’ accuracy and capability in mitigating the biases of individual models.

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