num_pages: 316
description: A nuts-and-bolts explanation of cryptography from a leading expert in information security.Despite its reputation as a language only of spies and hackers cryptography plays a critical role in our everyday lives. Though often invisible it underpins the security of our mobile phone calls credit card payments web searches internet messaging and cryptocurrenciesin short everything we do online. Increasingly it also runs in the background of our smart refrigerators thermostats electronic car keys and even the cars themselves. As our daily devices get smarter cyberspacehome to all the networks that connect themgrows.Broadly defined as a set of tools for establishing security in this expanding cyberspace cryptography enables us to protect and share our information. Understanding the basics of cryptography is the key to recognizing the significance of the security technologies we encounter every day which will then help us respond to them.What are the implications of connecting to an unprotected Wi-Fi network? Is it really so important to have different passwords for different accounts? Is it safe to submit sensitive personal information to a given app or to convert money to bitcoin? In clear concise writing information security expert Keith Martin answers all these questions and more revealing the many crucial ways we all depend on cryptographic technology. He demystifies its controversial applications and the nuances behind alarming headlines about data breaches at banks credit bureaus and online retailers. We learn for example how cryptography can hamper criminal investigations and obstruct national security efforts and how increasingly frequent ransomware attacks put personal information at risk. Yet we also learn why responding to these threats by restricting the use of cryptography can itself be problematic.Essential reading for anyone with a password Cryptography offers a profound perspective on personal security online and off.
language: None
title: Cryptography: The Key to Digital Security, How It Works, and Why It Matters
publisher: None