Chapter 8. Using Digital Signatures

IN THIS CHAPTER

  • What Are Digital Signatures?

  • Signing Messages and Verifying Signatures

  • Enveloping Messages

  • Building a Signing Utility

Now that you have an understanding of what digital certificates are and how to get, manage, and verify them, it's time to look at why you need them. In this chapter, you'll learn how digital certificates are used to sign messages so that the recipient can verify that the message came from you and that it hasn't been modified. By using these digital signatures , you can guarantee that the message received by someone is the same message you sent.

Along with signing messages, digital certificates are used as a means of exchanging public keys; you can use the message recipient's ...

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