Analyze the given network architecture or design for potential security vulnerabilities: [architecture or design description].Write a secure [language] function or module that performs [specific task or operation] while preventing [security threat or vulnerability].Suggest improvements to the following [language] code or configuration to enhance its network performance or security: [code snippet].Design a secure and efficient protocol for [specific use case or application].Evaluate the security of the given [language] code or configuration when interacting with [external service or API]: [code snippet].