Chapter 20: Information-Theoretic Secrecy

Learning Objectives

• Define the wiretap channel model and the notion of weak and strong secrecy
• Derive the secrecy capacity of the degraded wiretap channel using random binning
• Compute the secrecy capacity of the Gaussian wiretap channel
• Explain secret key generation from common randomness and the role of public discussion
• State the secrecy capacity of the MIMO wiretap channel and understand artificial noise injection
• Connect information-theoretic secrecy to physical-layer security in wireless systems