Security
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This section could use some updates. Consider [contributing](https://github.com/donnemartin/system-design-primer#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) .

### [](https://github.com/donnemartin/system-design-primer#sources-and-further-reading-12) Source(s) and further reading

- [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)