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A key agreement protocol is a means by which two parties engage in an exchange of incoming/outgoing messages, at the end of which, both participants would share a common secret. Such a shared secret can then be used to provide different security services such as replay detection, integrity protection, and confidentiality protection. diagrams/ka_class_diag.png

Figure 12: Key agreement class diagram
Four key agreement protocols are implemented in this library. They are:

The following sequence diagram shows a possible use of the key agreement API classes to negotiate a Diffie-Hellman protocol: diagrams/ka_seq_diag.png

Figure 13: Key agreement sequence diagram