Introduction

While cryptography is generally perceived as a complex field, there are tasks based on it that are part of our everyday lives as software developers, or at least they should be, to ensure a minimum level of security in our code base.

This chapter tries to cover recipes for most of the common tasks that you will have to face every day that can help to make your software resilient to attacks.

While software written in Python will hardly suffer from exploitation, such as buffer overflows (unless there are bugs in the interpreter or compiled libraries you rely on), there are still a whole bunch of cases where you might be leaking information that must remain undisclosed.