Discover how to take advantage of common cryptographic operations to
build safer apps that respect users' privacy with the help of examples
in JavaScript for Node.js and browsers
Key Features:
-
Understand how to implement common cryptographic operations in your
code with practical examples
-
Learn about picking modern safe algorithms, which libraries you should
rely on, and how to use them correctly
-
Build modern and secure applications that respect your users' privacy
with cryptography
Book Description:
If you're a software developer, this book will give you an introduction
to cryptography, helping you understand how to make the most of it for
your applications. The book contains extensive code samples in
JavaScript, both for Node.js and for frontend apps running in a web
browser, although the core concepts can be used by developers working
with any programming language and framework.
With a purely hands-on approach that is focused on sharing actionable
knowledge, you'll learn about the common categories of cryptographic
operations that you can leverage in all apps you're developing,
including hashing, encryption with symmetric, asymmetric and hybrid
ciphers, and digital signatures. You'll learn when to use these
operations and how to choose and implement the most popular algorithms
to perform them, including SHA-2, Argon2, AES, ChaCha20-Poly1305, RSA,
and Elliptic Curve Cryptography. Later, you'll learn how to deal with
password and key management. All code in this book is written in
JavaScript and designed to run in Node.js or as part of frontend apps
for web browsers.
By the end of this book, you'll be able to build solutions that leverage
cryptography to protect user privacy, offer better security against an
expanding and more complex threat landscape, help meet data protection
requirements, and unlock new opportunities.
What You Will Learn:
-
Write JavaScript code that uses cryptography running within a Node.js
environment for the server-side or in frontend applications for web
browsers
-
Use modern, safe hashing functions for calculating digests and key
derivation, including SHA-2 and Argon2
-
Practice encrypting messages and files with a symmetric key using AES
and ChaCha20-Poly1305
-
Use asymmetric and hybrid encryption, leveraging RSA and Elliptic
Curve Cryptography with ECDH and ECIES
-
Calculate and verify digital signatures using RSA and ECDSA/EdDSA
-
Manage passwords and encryption keys safely
Who this book is for:
This cryptography book is an introductory guide for software developers
who don't necessarily have a background in cryptography but are
interested in learning how to integrate it in their solutions, correctly
and safely. You'll need to have at least intermediate-level knowledge of
building apps with JavaScript and familiarity with Node.js to make the
most of this book.
