# Security

> From [The System Design Primer](https://github.com/donnemartin/system-design-primer) by Donne Martin, licensed under CC BY 4.0, arranged into chapters for this site. Part of "Building blocks". Web page: https://system.tangentbyte.com/learn/security

This section could use some updates. Consider [contributing](https://system.tangentbyte.com/learn/about#contributing)!

Security is a broad topic. Unless you have considerable experience, a security background, or are applying for a position that requires knowledge of security, you probably won't need to know more than the basics:

- Encrypt in transit and at rest.
- Sanitize all user inputs or any input parameters exposed to user to prevent [XSS](https://en.wikipedia.org/wiki/Cross-site_scripting) and [SQL injection](https://en.wikipedia.org/wiki/SQL_injection).
- Use parameterized queries to prevent SQL injection.
- Use the principle of [least privilege](https://en.wikipedia.org/wiki/Principle_of_least_privilege).

### Source(s) and further reading

- [API security checklist](https://github.com/shieldfy/API-Security-Checklist)
- [Security guide for developers](https://github.com/FallibleInc/security-guide-for-developers)
- [OWASP top ten](https://www.owasp.org/index.php/OWASP_Top_Ten_Cheat_Sheet)