Avaya Business Secure Router 252 Configuration - Basics Manuel d'utilisateur télécharger pdf (Page 261)

100

101

261

Nortel Business Secure Router 252 Configuration — Basics

Chapter 14

Certificates

This chapter gives background information about public-key certificates and

explains how to use them.

Certificates overview

The Business Secure Router can use certificates (also called digital IDs) to

authenticate users. Certificates are based on public-private key pairs. A certificate

contains the identity and public key of the certificate owner. Certificates provide a

way to exchange public keys for use in authentication.

A Certification Authority (CA) issues certificates and guarantees the identity of

each certificate owner. There are commercial certification authorities like

CyberTrust or VeriSign and government certification authorities. You can use the

Business Secure Router to generate certification requests that contain identifying

information and public keys and then send the certification requests to a

certification authority.

In public-key encryption and decryption, each host has two keys. One key is

public and can be made openly available; the other key is private and must be kept

secure. Public-key encryption in general works as follows.

1 Tim wants to send a private message to Jenny. Tim generates a public key

pair. What is encrypted with one key can only be decrypted using the other.

2 Tim keeps the private key and makes the public key openly available.

3 Tim uses his private key to encrypt the message and sends it to Jenny.

4 Jenny receives the message and uses Tim’s public key to decrypt it.

5 Additionally, Jenny uses her own private key to encrypt a message and Tim

uses Jenny’s public key to decrypt the message.

1 2 ... 256 257 258 259 260 261 262 263 264 265 266 ... 459 460

Commentaires sur ces manuels

Pas de commentaire

Avaya Business Secure Router 252 Configuration - Basics Manuel d'utilisateur Page 261

Commentaires sur ces manuels

Produits connexes et manuels pour Mise en réseau Avaya Business Secure Router 252 Configuration - Basics