CHAPTER 4
Cryptography
In this chapter, you will
- Identify and describe the three types of cryptography
- Learn about current cryptographic algorithms
- Understand how cryptography is applied for security
Cryptography is the science of encrypting, or hiding, information—something people have sought to do since they began using language. Although language allowed them to communicate with one another, people in power attempted to hide information by controlling who was taught to read and write. Eventually, more complicated methods of concealing information by shifting letters around to make the text unreadable were developed. These complicated methods are cryptographic algorithms, also known as ciphers. The word cipher comes from the Arabic word ...
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