I. Introduction

II. Fundamentals of Differential Privacy in Cognitive Radio Networks

III. Scenarios of Privacy Leakage During Cognitive Cycle and Prospective Role of Differential Privacy

IV. Performance Matrices for Evaluating Differentially Private CRN Mechanisms

V. Differential Privacy Approaches for Cognitive Radio Networks

VI. Applicability of Differential Privacy in Futuristic Cognitive Radios

VII. Challenges and Future Research Directions

VIII. Conclusion