Summary

In this chapter, we explored essential strategies for securely deploying Python applications. We began with secure coding fundamentals, emphasizing principles such as least privilege, defense in depth, fail securely, simplicity, and regular updates. These principles help create robust and resilient code.

Next, we covered input validation and sanitization techniques, which prevent malicious inputs from compromising your application. This included verifying data formats, ranges, and types, and cleaning or encoding inputs to prevent attacks such as SQL injection.

We then addressed preventing code injection and execution attacks, focusing on using parameterized queries and ORMs and avoiding shell commands or sanitizing inputs. These practices ensure the safe handling of user inputs and prevent unauthorized code execution.

Encryption was another key focus. We discussed symmetric encryption with Fernet, asymmetric encryption with RSA, and hashing with hashlib and bcrypt...