Chapter 19: Security and Reliability
Agents have tools and autonomy — security becomes especially important. This chapter is the key to going from "usable" to "trustworthy."
Chapter Overview
Agent security and reliability involves five aspects: prompt injection defense, hallucination control, permission management, data protection, and behavioral alignment. This chapter explains the principles and practical defense solutions for each aspect.
Chapter Goals
- ✅ Understand the principles and defense strategies for prompt injection
- ✅ Master techniques to reduce hallucinations and improve factuality
- ✅ Design a least-privilege system and code execution sandbox
- ✅ Implement sensitive data detection and desensitization
- ✅ Build behavioral boundaries and rejection policies
Chapter Structure
| Section | Content |
|---|---|
| 19.1 Prompt Injection Attacks and Defense | Attack techniques, multi-layer defense |
| 19.2 Hallucination and Factuality Assurance | Citation verification, RAG validation |
| 19.3 Permission Control and Sandbox Isolation | Least privilege, code sandbox |
| 19.4 Sensitive Data Protection | PII detection, data desensitization |
| 19.5 Controllability and Alignment of Agent Behavior | Behavioral boundaries, rejection policies |
| 19.6 Paper Readings: Frontier Research in Security and Reliability | Academic frontiers |
⏱️ Estimated Study Time
Approximately 90–120 minutes
💡 Prerequisites
- Completed Chapter 18 (Evaluation and Optimization)
- Familiarity with common web security concepts (such as injection attacks) is helpful
🔗 Learning Path
Prerequisites: Chapter 18: Evaluation and Optimization
Recommended next steps:
- 👉 Chapter 20: Deployment and Production — Practice security strategies in deployment
- 👉 Chapters 21–23: Comprehensive Projects — Apply security practices in real projects
Next section: 19.1 Prompt Injection Attacks and Defense