Information Security Expert
Comprehensive security frameworks for cybersecurity, incident response, and security architecture.
Security Architecture
Zero Trust Architecture
ZERO TRUST PRINCIPLES:
- Never trust, always verify
- Assume breach
- Verify explicitly
- Least privilege access
- Micro-segmentation
ZERO TRUST COMPONENTS:
IDENTITY:
- Strong authentication (MFA)
- Identity governance
- Privileged access management
- Continuous validation
DEVICES:
- Device health verification
- Endpoint detection and response
- Mobile device management
- Asset inventory
NETWORK:
- Micro-segmentation
- Software-defined perimeter
- Encrypted communications
- Network access control
APPLICATIONS:
- Application-level authentication
- API security
- Web application firewall
- Secure coding practices
DATA:
- Data classification
- Encryption at rest and in transit
- Data loss prevention
- Access controls
Defense in Depth
SECURITY LAYERS:
PHYSICAL:
- Data center security
- Badge access
- Surveillance
- Environmental controls
PERIMETER:
- Firewalls
- IDS/IPS
- DMZ
- VPN
NETWORK:
- Segmentation
- Encryption
- Network monitoring
- NAC
HOST:
- Endpoint protection
- Host-based firewall
- Hardening
- Patch management
APPLICATION:
- WAF
- Secure coding
- Input validation
- Authentication
DATA:
- Encryption
- DLP
- Access controls
- Backup/recovery
Cloud Security
| Domain |
Controls |
| Identity |
SSO, MFA, PAM, IAM policies |
| Compute |
Hardened images, container security |
| Network |
VPC, security groups, WAF |
| Storage |
Encryption, access policies, backup |
| Logging |
CloudTrail, SIEM integration |
| Compliance |
Config rules, automated remediation |
For detailed security frameworks (NIST, ISO 27001, CIS Controls, MITRE ATT&CK), see Security Frameworks Reference.
Vulnerability Management
Vulnerability Management Process
LIFECYCLE:
1. DISCOVERY
- Asset inventory
- Vulnerability scanning
- Penetration testing
- Code analysis
2. PRIORITIZATION
- CVSS scoring
- Asset criticality
- Exploit availability
- Business context
3. REMEDIATION
- Patch management
- Configuration changes
- Compensating controls
- Risk acceptance
4. VERIFICATION
- Rescan
- Validation testing
- Documentation
- Reporting
5. REPORTING
- Executive dashboards
- Trend analysis
- Compliance reporting
- SLA tracking
CVSS Scoring
| Score |
Severity |
SLA Target |
| 9.0-10.0 |
Critical |
7 days |
| 7.0-8.9 |
High |
30 days |
| 4.0-6.9 |
Medium |
90 days |
| 0.1-3.9 |
Low |
Best effort |
Patch Management
PATCH PROCESS:
1. IDENTIFICATION
- Vendor announcements
- Vulnerability feeds
- Security bulletins
2. ASSESSMENT
- Applicability
- Risk evaluation
- Test requirements
3. TESTING
- Lab validation
- Compatibility testing
- Rollback planning
4. DEPLOYMENT
- Pilot group
- Phased rollout
- Monitoring
5. VERIFICATION
- Confirm installation
- Functional testing
- Documentation
Identity & Access Management
IAM Framework
IAM COMPONENTS:
IDENTITY LIFECYCLE:
- Provisioning
- Modification
- De-provisioning
- Certification
AUTHENTICATION:
- Password policies
- Multi-factor authentication
- Single sign-on
- Passwordless
AUTHORIZATION:
- Role-based access (RBAC)
- Attribute-based access (ABAC)
- Least privilege
- Separation of duties
GOVERNANCE:
- Access reviews
- Policy enforcement
- Audit logging
- Compliance reporting
Privileged Access Management
PAM CONTROLS:
VAULT:
- Credential storage
- Password rotation
- Secrets management
SESSION:
- Session recording
- Just-in-time access
- Time-limited credentials
MONITORING:
- Activity logging
- Behavioral analytics
- Alert on anomalies
GOVERNANCE:
- Access certification
- Policy enforcement
- Compliance reporting
Security Awareness
Security Training Program
| Topic |
Frequency |
Audience |
| New Hire Security |
Onboarding |
All employees |
| Annual Refresh |
Annually |
All employees |
| Phishing Awareness |
Quarterly |
All employees |
| Developer Security |
Annually |
Development team |
| Executive Briefings |
Quarterly |
Leadership |
| Role-Based |
As needed |
Specific roles |
Phishing Simulation
SIMULATION PROGRAM:
FREQUENCY: Monthly
DIFFICULTY LEVELS:
- Easy: Generic, obvious errors
- Medium: Branded, some personalization
- Hard: Targeted, well-crafted
METRICS:
- Click rate
- Report rate
- Training completion
- Trend over time
RESPONSE:
- Click → Immediate training
- Report → Positive reinforcement
- Repeat offenders → Additional training
Security Metrics
Key Security Metrics
| Category |
Metric |
Target |
| Vulnerability |
Critical vulns open >30 days |
0 |
| Patching |
Systems patched within SLA |
95%+ |
| Incidents |
Mean time to detect |
<24 hours |
| Access |
Orphan accounts |
0 |
| Training |
Completion rate |
95%+ |
| Phishing |
Click rate |
<5% |
Security Dashboard
EXECUTIVE DASHBOARD:
RISK POSTURE:
- Overall risk score
- Risk trend
- Top risks
COMPLIANCE:
- Framework coverage
- Audit findings
- Remediation status
OPERATIONS:
- Incident summary
- Vulnerability status
- Patching compliance
INVESTMENT:
- Budget utilization
- Tool effectiveness
- Headcount
Threat Intelligence
Threat Intelligence Sources
| Type |
Sources |
Use |
| Strategic |
Industry reports, geopolitical |
Executive briefings |
| Tactical |
TTPs, malware analysis |
Detection rules |
| Operational |
IOCs, campaigns |
Active response |
| Technical |
Signatures, hashes |
Automated blocking |
For detailed incident response processes and SOC operations, see Incident Response Reference.
References
- Security Frameworks Reference - NIST, ISO 27001, CIS Controls, MITRE ATT&CK
- Incident Response Reference - IR process, severity levels, SOC operations
See Also
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