Overview

A Certificate Authority is a trusted entity is that issues digital certificates to devices which need secure communication and plays an important part in the public key infrastructure (PKI). There are several CA implementations provided by third-party CA vendors like Microsoft or the open source OpenSSL implementation but in this article we will focus on configuring the internal Certificate Authority server which is available on Cisco IOS. We will also discuss about the certificate enrollment process with a CA and how these digital certificates can be used for authentication purposes. This feature has been introduced in Cisco IOS version 12.3(4)T and it’s available only on Cisco IOS images with the security feature set.

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