Here is a series of slide shows that require a basic knowledge of SSL or TLS. Actually, the protocol that is considered is SSL. These documents mainly highlight the SSL session and connection states during the negotiation phase, as well as the interactions between SSL layers and components. The layered structure of SSL is shown on Figure 1. Colors related to each component are used consistently throughout the documents.

The main case study is followed by two variants related to the first exchanges.

Figure 1: SSL Layer Model 

This main case study is derived from the following Netscape's traces, prepared to assist developers of SSL implementations, by Nelson Bolyard:

• Domestic Client SSL Connection Details
• Domestic Server SSL Connection Details

This document provides a detailed description of the sequence of exchanges between an SSL Client and an SSL Server. This main scenario includes the Client's Certificate option, as well as the Session's resumption, and the type of encryption algorithm used is "stream cipher".

  SSL Main Scenario -- 2 March 2005, v1.0

Figure 2: Exchanges for Main Scenario 

This first variant takes into account a US export situation, with constraints concerning the key size. The generation of a temporary 512-bit RSA key is illustrated.

  SSL First Variant -- 2 March 2005, v1.0

Figure 3: Exchanges for Variant 1 

This second variant shows the generation of an ephemeral Diffie-Hellman key for ensuring the perfect forward secrecy (PFS) service.

  SSL Second Variant -- 2 March 2005, v1.0

Figure 4: Exchanges for Variant 2