Implementing Cisco IOS Network Security (IINS): (CCNA Security exam 640-553) (Authorized Self-Study Guide)

CHAPTER 4. Fundamentals of Cryptography

This chapter introduces the concepts of cryptography and covers the following topics:

• Encryption, hashing, and digital signatures and how they provide confidentiality, integrity, and nonrepudiation

• Methods, algorithms, and purposes of symmetric encryption

• Use and purpose of hashes and digital signatures in providing integrity and nonrepudiation

• Use and purpose of asymmetric encryption and Public Key Infrastructure (PKI)

An IP Security (IPsec) virtual private network (VPN) is often used to connect branch offices, remote employees, and business partners to the resources of your company. It is a reliable ...