CCNA Security (640-554) Portable Command Guide

Chapter 15. Asymmetric Encryption and PKI

This chapter covers the following topics:

Asymmetric Encryption

• Public Key Confidentiality and Authentication

• RSA Functions

Public Key Infrastructure

• PKI Terminology

• PKI Standards

• PKI Topologies

• PKI Characteristics

Asymmetric Encryption

Asymmetric algorithms are based on complex mathematical formulas, and therefore computation takes more time than symmetric algorithms.

Examples of public key encryption algorithms are the Rivest, Shamir, and Adleman (RSA) algorithm; Digital Signature Algorithm (DSA); Diffie-Hellman (D-H); ElGamal; and elliptic curve cryptography (ECC).

Public Key Confidentiality and Authentication

Asymmetric algorithms use a public key and a private key. Both keys are capable ...