need-help-in-cryptography-course-discussion-3

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.Please explain the PKI process and identify the PKI structure to include the major roles.As it relates to certificates in the real world, what is X.509 and why is it important?What are some issues that we should be aware of when building and using PKI Infrastructure?part 2: we need to respond to two of my classmates posts.Required TextStallings, Williams. Cryptography and Network Security. Pearson, 2017.Print ISBN: 9780134444284, 0134444280eText ISBN: 9780134444635, 0134444639Other articles and readings may be assigned by course professor.Recommended Materials/ResourcesHarris, Shon. All in One CISSP Exam Guide, Sixth Edition. McGraw-Hill, 2013.Paar, Christof, Pelzl,Jan and Preneel, Bart. Understanding Cryptography: A Textbook for Students and Practitioners. Springer Publishing, 2010.Rhodes-Ousley, Mark. The Complete Reference to Information Security, Second Edition.McGraw-Hill, 2013.this website