A secure certificate based authentication to reduce overhead for heterogeneous wireless network

Heterogeneous Wireless Networks (HWN) have various challenging issues in that seamless and secure handoff are the most important this is due to open access medium and frequent mobility of users among various wireless networks. This requires strong, quick and mutual authentication during Vertical Handover (VHO). This paper presents a novel authentication algorithm Signed Trusted Authentication for Vertical Handover (STAVHO). It has the ability to protect the identity of the user and provides data integrity and confidentiality. STAVHO also resists against man-in-the-middle attack and replay attacks.