Key Management System In Secure LAN

Key management is the set of techniques and procedures supporting the establishment and maintenance of keying relationships between authorized parties. It is a key factor in a secure network.This thesis investigates the theories and applications of key management. First, basic knowledge about key management is introduced; secondly, after the detailed analysis of IEEE 802.10 standard , some key management protocols are improved, and one of them is applied in newly designed network interface card with encryption; Finally, a new solution of key management is proposed to enable STAs to roam between APs.The main contents are:1. The security framework of IEEE 802.10 standard is described in detail. After the detailed analysis of key management protocols by means of BAN Logic, we draw a conclusion that the security framework is fit for the realization of secure LAN, but some protocols in the standard are flawed.2. Some protocols in the standard are improved, and one of them, namely the key management protocol based on key distribution center, is applied in the newly designed network interface card with encryption.3. After the descriptions of security issues in IEEE 802.11 wireless LAN and of key management methods in IEEE 802.111 draft, a new solution of key management is proposed to enable STAs to roam between APs.