The Importance of Security.- Why Is Secure Programming a Concern?.- Maintaining a Secure Environment.- Dealing with Shared Hosts.- Maintaining Separate Development and Production Environments.- Keeping Software Up to Date.- Using Encryption I: Theory.- Using Encryption II: Practice.- Securing Network Connections I: SSL.- Securing Network Connections II: SSH.- Controlling Access I: Authentication.- Controlling Access II: Permissions and Restrictions.- Practicing Secure PHP Programming.- Validating User Input.- Preventing SQL Injection.- Preventing Cross-Site Scripting.- Preventing Remote Execution.- Enforcing Security for Temporary Files.- Preventing Session Hijacking.- Practicing Secure Operations.- Allowing Only Human Users.- Verifying Your Users’ Identities.- Using Roles to Authorize Actions.- Adding Accountability to Track Your Users.- Preventing Data Loss.- Safely Executing System Commands.- Handling Remote Procedure Calls Safely.- Taking Advantage of Peer Review.