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