Public Key Infrastructure (PKI)

Public Key Infrastructure (PKI) is a combination of software, hardware, and policies used to secure communications over an insecure medium. PKI can also provide a system that allows validation of credentials, known as digital signatures, that are the cornerstone of the system.

1) Please explain the PKI process and identify the PKI structure to include the major roles.

2) As it relates to certificates in the real world, what is X.509 and why is it important?

3) What are some issues that we should be aware of when building and using PKI Infrastructure?