Chapter 6

Domain 5Cryptography

Exam objectives in this chapter

• Cornerstone Cryptographic Concepts

• History of Cryptography

• Symmetric Encryption

• Asymmetric Encryption

• Hash Functions

• Cryptographic Attacks

• Implementing Cryptography

Unique Terms and Definitions

• Plaintext—An unencrypted message.

• Ciphertext—An encrypted message.

• Cryptology—The science of secure communications.

• Symmetric Encryption—Encryption that uses one key to encrypt and decrypt.

• Asymmetric Encryption—Encryption that uses two keys; if you encrypt with one, you may decrypt with the other.

• Hash Function—One-way encryption using an algorithm and no key.


Cryptography is secret writing: secure communication that may be understood by the intended recipient ...

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