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Security Architecture

The Solution Architect is the key link between business requirements, technical solutions, and the dev team for security. While dedicated InfoSec specialists exist, the architect sees the holistic picture and highlights weak spots.

Why Security Matters

  1. User data protection - leaks lead to legal sanctions and fines
  2. Financial asset protection - compromised systems cause losses
  3. IP protection - patents, source code, business plans
  4. Reputation - breaches repel customers
  5. Compliance - strict data security laws (GDPR, industry regulations)
  6. Competitive advantage - security as differentiator

Application-Level Security Checklist

Area Threats Mitigations
Input validation SQL injection, XSS, command injection Parameterized queries, framework validation, sanitize all input
Authentication Unauthorized access, session hijacking OAuth, JWT, SAML, MFA
Session management Data interception Unique IDs, Keycloak, lifetime limits
Data encryption Interception, exposure AES (rest), TLS (transit)
API security Code injection, data exposure API Gateway, validate types/sizes/formats
Logging Undetected attacks, no audit trail ELK Stack, Grafana, log all suspicious actions
Code scanning Vulnerabilities OWASP ZAP, SonarQube, regular reviews
Error handling Information leakage Custom error pages, internal-only details
Rate limiting DoS/DDoS Per-user/IP limits

Data-Level Security

Control Description
At-rest encryption AES, TDE. Regular key rotation
In-transit encryption TLS/SSL for all data transmission
In-use encryption Intel SGX for memory-level security
Data masking Replace PII for non-production environments
RBAC Role-Based Access Control, principle of least privilege
Backup Regular, remote, secure locations
Audit Log all data queries, monitor unusual patterns
DLP Monitor/block unauthorized data transfer
WORM Write Once Read Many for immutable backups
Zero Trust Verify every request regardless of source

Architect's Security Workflow

Planning and Analysis

  1. Assess security requirements (stakeholders, regulations, business needs)
  2. Risk analysis (identify threats, vulnerabilities, assess risks)
  3. Technology selection with security in mind

Design

  1. Minimize attack surface
  2. Design access control and authorization model
  3. Plan encryption for storage and transmission
  4. Integrate audit and logging
  5. Plan backup and recovery

Development

  1. Regular code reviews for vulnerabilities
  2. Secure coding principles (OWASP Top 10)
  3. Penetration testing

Deployment and Operations

  1. Configure access control including MFA
  2. Regular updates and security patches
  3. Security monitoring and incident response

Continuous Improvement

  1. Staff security training
  2. Periodic audits and compliance reviews
  3. Incident analysis and process improvements

Automation Principle

Bake security into CI/CD: - Automated vulnerability scanning - Automated security testing - Automated compliance checks - Automated incident detection - Infrastructure as Code with security policies

The architect's role is NOT to implement every detail but to identify weak spots and communicate them. Security is about people and processes, not just technology.

Gotchas

  • Security as afterthought - much more expensive to add later. Design in from the start
  • Internal network trust - Zero Trust means even internal services must authenticate
  • Over-detailed error messages in production reveal system internals to attackers
  • OWASP Top 10 changes over time - keep current with latest version
  • Compliance != security - meeting regulatory requirements is necessary but not sufficient

See Also