Chapter 4. Core PKI Services: Authentication, Integrity, and Confidentiality

In the previous chapter, we looked at the concept of a security infrastructure and gave a definition of a comprehensive PKI. Now, consider the services that a PKI offers an organization. In this chapter, we examine the fundamental, or core, security services associated with a PKI; in Chapter 5, we examine a number of additional services that a PKI can enable for various business purposes.


A PKI is generally considered to be associated with three primary services:

  • Authentication is the assurance to one entity that another entity is who he, she, or it claims to be.

  • Integrity is the assurance to an entity that data has not been altered (intentionally or unintentionally) ...

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