Implementing-cryptography-using-python

Introduction
I initiated my journey into cryptography while studying for my undergrad. Most
of the cryptography concepts I learned were based on what one would need for
their CISSP or Security+ exams. Most of my understanding was at a high level,
and it was difficult to remember the more intricate aspects until cryptography
became a primary focus.
It wasn’t until I started my master’s in cybersecurity that I began applying
cryptographic features within a scripting environment. The concepts in this
book will help you advance your knowledge and experience as you dig deeper
into understanding the use of cryptography in Python.
Over the past few years, several governments have discussed legislation that
will ensure that any form of communication, whether it’s an email, text message, or
video chat, can always be read by the police or intelligence services if they have a
warrant. Governments are putting pressure on technology companies to give them
backdoor access or the keys to the kingdom so that they can keep the country safe.
The fight between lawmakers and encrypted messaging platforms has entered
new territory. Imagine a world where the government has seized the opportunity
to scan every electronic message by government-approved scanning
software. The privacy and security of all users will suffer if law enforcement
agencies achieve their dream of breaking cryptosystems. Proponents of end-toend
encryption, like Microsoft, Facebook, and Google, may lose their campaign
to maintain user security as a priority.
We have all heard of times when it would be beneficial for encrypted data
to magically become readable; this is often related to criminal cases. Should
criminals be allowed to plot their plans in secret? Where does the right to our
privacy start? In reality, there are technical and legal issues with allowing governments
to do this; this of course will be strongly opposed by technology and
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