Security Skills

Overview

Security knowledge essential for building secure applications, protecting user data, and preventing common vulnerabilities.

Security Layers

┌─────────────────────────────────────────────┐
│              Application Security            │
│  ┌─────────────────────────────────────────┐│
│  │         Authentication & AuthZ          ││
│  │  ┌───────────────────────────────────┐  ││
│  │  │        Input Validation           │  ││
│  │  │  ┌─────────────────────────────┐  │  ││
│  │  │  │    Data Protection          │  │  ││
│  │  │  └─────────────────────────────┘  │  ││
│  │  └───────────────────────────────────┘  ││
│  └─────────────────────────────────────────┘│
│              Infrastructure Security         │
└─────────────────────────────────────────────┘

Categories

Authentication

• JWT tokens and refresh strategies
• OAuth 2.0 / OpenID Connect
• Session management
• Multi-factor authentication
• Passwordless authentication

Authorization

• Role-Based Access Control (RBAC)
• Attribute-Based Access Control (ABAC)
• Permission systems
• Access control patterns

OWASP Top 10

• Injection attacks
• Broken authentication
• Cross-Site Scripting (XSS)
• Cross-Site Request Forgery (CSRF)
• Security misconfiguration
• Sensitive data exposure

API Security

• Rate limiting
• Input validation
• API key management
• CORS configuration

Data Protection

• Encryption at rest/transit
• Password hashing
• Secrets management
• Data masking/anonymization

Infrastructure

• HTTPS/TLS configuration
• Security headers
• Container security
• Network security

Compliance

• GDPR requirements
• PCI-DSS standards
• Security auditing

Security Mindset

"Security is not a product, but a process." - Bruce Schneier

Always assume:

• All input is malicious
• External systems can be compromised
• Attackers will find vulnerabilities
• Defense in depth is essential

Quick Reference

Related Skills

• API Design - Secure API patterns
• Testing - Security testing
• Architecture - Security architecture