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wiki/concepts/Defense-in-Depth.md
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title: "Defense in Depth"
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type: concept
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tags: [security, architecture, risk-mitigation]
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sources: [self-healing-home-server-infrastructure-management]
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last_updated: 2026-04-17
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---
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## Summary
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Defense in Depth(纵深防御)是一种多层安全架构策略,通过在多个层面部署安全控制来保护系统,即使某一层被突破,其他层仍能提供保护。在 AI Agent 安全设置中尤为重要。
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## Definition
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通过在网络、主机、应用和数据多个层面部署互补的安全控制,实现全面防护的安全架构。
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## Key Layers
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1. **网络层**:网络分段、防火墙、入侵检测
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2. **主机层**:访问控制、系统加固、监控
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3. **应用层**:输入验证、安全扫描、审计日志
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4. **数据层**:加密、访问控制、备份
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## AI Agent Security Application
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- 专用 1Password vault 限制 AI 访问范围
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- 网络分段隔离敏感服务
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- 每日安全审计检查特权容器、硬编码 secrets、过度宽松权限
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- 分支保护:PR 必须人工审查,Agent 无法覆盖
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## Connections
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- [[TruffleHog]] ← implements ← [[Defense in Depth]]:TruffleHog 扫描实现应用层安全
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- [[Gitea]] ← enables ← [[Defense in Depth]]:本地 Git 作为防御层
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- [[Zero Trust Architecture]] ← related_to ← [[Defense in Depth]]:纵深防御是零信任的基础
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