Security standards

Skill ComeOnOliver/skillshub/skills/HoangNguyen0403/agent-skills-standard/security-standards

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Universal security protocols for safe, resilient software. Use when implementing authentication, encryption, authorization, or any security-sensitive feature.

SKILL.md

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Security Standards - High-Density Standards

Universal security protocols for building safe and resilient software.

Priority: P0 (CRITICAL)

🛡 Data Safeguarding

Zero Trust: Never trust external input. Sanitize and validate every data boundary (API, UI, CSV).
Least Privilege: Grant minimum necessary permissions to users, services, and containers.
No Hardcoded Secrets: Use environment variables or secret managers. Never commit keys or passwords.
Encryption: Use modern, collision-resistant algorithms (AES-256 for data-at-rest; TLS 1.3 for data-in-transit).
PII Logging: Never log PII (email, phone, names). Mask sensitive fields before logging.

🧱 Secure Coding Practices

Injection Prevention: Use parameterized queries or ORMs to stop SQL, Command, and XSS injections.
Dependency Management: Regularly scan (audit) and update third-party libraries to patch CVEs.
Secure Auth: Implement Multi-Factor Authentication (MFA) and secure session management.
Error Privacy: Never leak stack traces or internal implementation details to the end-user.

🔍 Continuous Security

Shift Left: Integrate security scanners (SAST/DAST) early in the CI/CD pipeline.
Data Minimization: Collect and store only the absolute minimum data required for the business logic.
Logging: Maintain audit logs for sensitive operations (Auth, Deletion, Admin changes).

🚫 Anti-Patterns

Hardcoded Secrets: **No Secrets in Git**: Use Secret Managers or Env variables.
Raw SQL: **No String Concatenation**: Use Parameterized queries or ORMs.
Leaking Context: **No Stacktraces in Prod**: Return generic error codes to clients.
Insecure Defaults: **No Default Passwords**: Force rotation and strong entropy.