4 Secure TCP Protocols

In this section, we describe design of the Secure TCP. We call the current version of TCP as ``classical TCP'' throughout the rest of this paper.

In the Secure TCP, its essential parts are the security service negotiation, the key exchange for encryption and TCP segment encryption. In the following subsections, we discuss the design of these parts.

• 4.1 Extension of Three-Way Handshake
  • 4.1.1 Security Service Type Negotiation
  • 4.1.2 Key Exchange
• 4.2 State Transition
• 4.3 Security Service
  • 4.3.1 Data Integrity
  • 4.3.2 Data Confidentiality