Thesis (MEng(Telecommunications))--University of South Australia, 2013. Includes bibliographical references (pages 65-67). This thesis addresses the analysis and design of channel codes for physical layer security. Wyner's wiretap channel is considered as the basic transmission model with a focus on the binary-input symmetric discrete memoryless channels. Firstly, a new technique to quantify the equivocation rate is proposed, providing an e_cient tool to measure the achievable secrecy levels for di_erent wiretap channel models based on the binary erasure channel model. The probability of secrecy outage and the average secrecy rate are then investigated for general binary-input symmetric discrete memoryless channels from a channel-coding perspective.