AI Agent Security Checklist: 25 Critical Controls for Production
Deploying AI agents without proper security controls is like leaving your front door open with a sign that says " valuables inside." This checklist covers the 25 critical controls that separate production-ready agents from security disasters.
Reality check: 73% of AI agent deployments have at least one critical security vulnerability. Most are discovered only after a breach. Use this checklist before going live.
Authentication & Access Control (Controls 1-5)
API Key Management
Store all API keys in a secrets vault (HashiCorp Vault, AWS Secrets Manager). Never hardcode keys. Rotate every 90 days minimum.
Role-Based Access Control (RBAC)
Define granular permissions. Agents should have minimum required access. Separate read/write/execute permissions per function.
Multi-Factor Authentication
Require MFA for administrative access to agent systems. No exceptions. Single points of authentication are single points of failure.
Session Management
Implement session timeouts (max 8 hours). Regenerate session IDs after authentication. Invalidate sessions on privilege changes.
Principle of Least Privilege
Agents start with zero permissions. Add only what's needed for specific tasks. Review and revoke unused permissions monthly.
Input/Output Security (Controls 6-10)
Input Validation & Sanitization
All inputs validated against allowlists. Reject unexpected formats. Strip dangerous characters. Never trust user input.
Prompt Injection Prevention
Isolate user input from system prompts. Use delimiters and escaping. Implement content filters. Test against known attack patterns.
Output Filtering
Scan all outputs for PII, credentials, and sensitive data before transmission. Redact or block matches automatically.
Content Security Policy
Define what content agents can access and generate. Block executable content. Prevent markdown/HTML injection in outputs.
Token Limits & Budget Controls
Set maximum tokens per request. Implement daily/hourly limits. Alert on unusual consumption patterns. Kill runaway processes.
Data Protection (Controls 11-15)
Data Encryption at Rest
All stored data encrypted with AES-256. Encrypt logs, caches, and temporary files. Key rotation policy in place.
Data Encryption in Transit
TLS 1.3 for all communications. Certificate pinning for API calls. No mixed content. Regular cipher suite audits.
Data Minimization
Collect only necessary data. Auto-delete after retention period. Anonymize where possible. Document data flows.
Memory Isolation
Sensitive data in memory is encrypted. Clear memory after use. No swapping to disk. Secure memory allocation.
Backup & Recovery
Encrypted backups with tested restore procedures. Geographic redundancy. Access logs for backup systems. Regular recovery drills.
Monitoring & Logging (Controls 16-20)
Comprehensive Audit Logging
Log all agent actions: inputs, outputs, API calls, errors. Include timestamps, user IDs, and context. Tamper-proof storage.
Real-Time Alerting
Alert on anomalies: unusual API calls, permission changes, failed authentications, budget overruns. Sub-minute notification.
Behavioral Analysis
Baseline normal agent behavior. Flag deviations from patterns. Machine learning for anomaly detection. Reduce false positives.
Performance Monitoring
Track latency, throughput, error rates. Set SLAs and alert on breaches. Identify performance degradation before outages.
Log Retention & Compliance
Retain logs per regulatory requirements (typically 1-7 years). Ensure logs support audit trails. Right to erasure where applicable.
Incident Response (Controls 21-25)
Incident Response Plan
Documented procedures for breaches. Roles and responsibilities defined. Contact lists updated. Tested quarterly.
Automated Threat Response
Auto-block suspicious IPs. Rate limit aggressive clients. Kill compromised sessions. Isolate affected systems.
Rollback Capability
Instant rollback to last known good state. Version control for agent configurations. Point-in-time recovery for data.
Post-Incident Review
Document all incidents. Root cause analysis. Update controls based on learnings. Share relevant findings with team.
Business Continuity
Failover systems tested. Manual fallback procedures. Communication plan for stakeholders. Regular continuity drills.
⚠️ Common blind spot: 60% of AI agent breaches come from third-party integrations. Your security is only as strong as your weakest API connection. Audit all external services.
Implementation Priority
Not all controls are equal. Prioritize based on your risk profile:
- Controls 1, 6, 7, 16, 21 — Core security hygiene
- Controls 2-5, 8-10, 11-12 — Access control and data protection
- Controls 13-15, 17-20, 22-25 — Monitoring and response
Security Assessment Questions
Ask yourself these questions before going live:
- Can I trace every action an agent takes back to a user?
- If an agent is compromised, what's the blast radius?
- How quickly can I detect a security incident?
- How quickly can I recover from a breach?
- Who has access to agent credentials and how are they managed?
- What data can agents access and is it all necessary?
- Have I tested against known attack vectors?
- What's my plan when (not if) something goes wrong?
The 80/20 of AI security: 80% of breaches are prevented by 20% of controls. Focus on: input validation, output filtering, audit logging, and access control. Get these right before optimizing the rest.
Common Mistakes to Avoid
Mistake 1: Security as an Afterthought
Building features first, then "adding security" doesn't work. Security must be designed in from the start. Retrofitting is expensive and incomplete.
Mistake 2: Trusting Internal Networks
"It's only accessible internally" is not a security control. Assume breaches. Zero-trust architecture for all agent communications.
Mistake 3: Copying Checklists Without Context
This checklist is a starting point. Your specific risks, compliance requirements, and threat model determine which controls matter most.
Mistake 4: Set-It-And-Forget-It
Security is ongoing. New vulnerabilities emerge daily. Schedule regular reviews. Subscribe to security advisories. Update controls continuously.
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