INFRASTRUCTURE (40 items) ⏱️ 80-120 hours
  
  Server & OS:
    [ ] Operating system fully patched and hardened
    [ ] Unnecessary services disabled
    [ ] Firewall configured (iptables/nftables)
    [ ] SELinux/AppArmor enabled and configured
    [ ] Automatic security updates configured
    [ ] NTP synchronized
    [ ] Timezone set correctly for logging
    [ ] Kernel parameters tuned for security
    [ ] File integrity monitoring (AIDE/Tripwire)
    [ ] Antivirus/EDR agent installed
    
  Container Security:
    [ ] Docker daemon configured securely
    [ ] User namespaces enabled
    [ ] Seccomp profiles applied
    [ ] AppArmor/SELinux profiles for containers
    [ ] Container images scanned (Trivy/Clair)
    [ ] Images from trusted registries only
    [ ] No privileged containers
    [ ] Resource limits enforced
    [ ] Read-only root filesystem where possible
    [ ] Secrets not in environment variables
    
  Network Security:
    [ ] VPC/network segmentation implemented
    [ ] Security groups/firewall rules configured
    [ ] Principle of least privilege for network access
    [ ] DDoS protection configured
    [ ] WAF deployed and configured
    [ ] Reverse proxy hardened (Nginx/HAProxy)
    [ ] Rate limiting configured
    [ ] SSL/TLS with strong ciphers only
    [ ] Certificate management automated
    [ ] Internal traffic encrypted (mTLS if possible)
    
  Database Security:
    [ ] PostgreSQL (not SQLite) in production
    [ ] Database on separate network segment
    [ ] Encryption at rest enabled
    [ ] Encryption in transit (SSL)
    [ ] Strong database passwords
    [ ] Least privilege database users
    [ ] Database backups encrypted
    [ ] Backup restoration tested
    [ ] Query logging enabled
    [ ] Connection logging enabled
 
PLATFORM CONFIGURATION (35 items) ⏱️ 40-60 hours
 
  Application Security:
    [ ] Latest stable version installed
    [ ] All known CVEs patched
    [ ] Default credentials changed
    [ ] Strong encryption key generated (32+ chars)
    [ ] Encryption key stored in secrets manager
    [ ] Admin panel not publicly accessible
    [ ] API endpoints authenticated
    [ ] CORS configured restrictively
    [ ] Security headers configured
    [ ] Error messages don't leak info
    [ ] File upload restrictions
    [ ] Request size limits
    [ ] Webhook signature verification
    [ ] Debug mode disabled
    [ ] Version disclosure disabled
    
  Authentication & Access:
    [ ] SSO/SAML integrated and tested
    [ ] MFA enabled and enforced
    [ ] Password complexity enforced
    [ ] Account lockout configured
    [ ] Session timeout configured (≤1 hour)
    [ ] Concurrent session limits
    [ ] Password reset secure
    [ ] Admin accounts use separate credentials
    [ ] Service accounts for automation
    [ ] API keys rotated from defaults
    [ ] Guest access disabled
    [ ] Role hierarchy documented
    [ ] Least privilege roles assigned
    [ ] User offboarding process defined
    
  Credential Management:
    [ ] External secrets vault integrated (Vault/AWS Secrets)
    [ ] Credentials not stored in platform DB
    [ ] Test credentials created for workflows
    [ ] Production credentials isolated
    [ ] Credential rotation schedule defined
    [ ] Read-only credentials used where possible
    [ ] Credential access audit logging
    [ ] Hardcoded secrets scanner configured
    
MONITORING & RESPONSE (25 items) ⏱️ 40-60 hours
 
  Logging:
    [ ] Application audit logs enabled
    [ ] System logs centralized (syslog)
    [ ] Container logs captured
    [ ] Database audit logs enabled
    [ ] Web server access logs configured
    [ ] WAF logs captured
    [ ] Log retention policy configured (1 year+)
    [ ] Logs shipped to SIEM
    [ ] Log integrity protected (write-once)
    [ ] PII scrubbed from logs
    
  Alerting:
    [ ] Failed login alerts configured
    [ ] Privilege escalation alerts
    [ ] Unusual workflow execution alerts
    [ ] High-severity CVE alerts
    [ ] Resource exhaustion alerts
    [ ] Certificate expiration alerts
    [ ] Backup failure alerts
    [ ] Anomaly detection configured
    
  Incident Response:
    [ ] IR plan documented
    [ ] IR team identified
    [ ] Escalation procedures defined
    [ ] Forensic evidence collection procedures
    [ ] Backup/restore procedures tested
    [ ] Communication plan defined
    [ ] Post-mortem template ready
    [ ] Tabletop exercise completed
    
COMPLIANCE & DOCUMENTATION (20 items) ⏱️ 30-40 hours
 
  Documentation:
    [ ] Architecture diagram created
    [ ] Network diagram created
    [ ] Data flow diagram created
    [ ] Runbooks created (common tasks)
    [ ] Disaster recovery plan documented
    [ ] Security policies documented
    [ ] Acceptable use policy created
    [ ] Admin procedures documented
    [ ] User training materials created
    [ ] Configuration management database (CMDB)
    
  Compliance:
    [ ] Data classification completed
    [ ] Privacy impact assessment
    [ ] Risk assessment documented
    [ ] Compliance requirements mapped
    [ ] Audit trail validated
    [ ] Data retention policy configured
    [ ] Data deletion procedures
    [ ] Vendor/third-party inventory
    [ ] Security assessment completed
    [ ] Penetration test scheduled
    
────────────────────────────────────────────────────────────
TOTAL CHECKLIST: 120 items
ESTIMATED EFFORT: 200-300 hours before production