Enhancing privacy and security in 5G networks with an anonymous handover protocol based on blockchain and zero knowledge proof

Abstract

The latest advancement in cellular technology, 5G, has the ability to facilitate various applications such as Device-to-Device (D2D) communication, vehicular communications, and the Internet of Everything (IoE). However, the technology is faced with challenges related to user privacy, resource management, handover authentication, and security of the air interface and internet channels. Moreover, the use of specialized base stations such as wireless Access Points (AP) and Road-Side Units (RSU) in vehicular communications may be owned by subscribers outside formal network operators. The conventional handover authentication schemes have a lengthy latency period that conflicts with the 5G quality of service. To tackle these challenges, this paper presents an anonymous scheme that utilizes Blockchain and Zero Knowledge Proof (ZKP) to ensure efficient privacy in the handover protocol of 5G Networks. The proposed scheme has been thoroughly evaluated for security and privacy and has shown to be resistant to identity catching, location area tracing, and replay attacks while achieving Forward/Backward secrecy. Furthermore, the performance evaluation of the proposed scheme indicates that it is efficient and speedy as it involves a limited number of messages, low computation, and does not necessitate the involvement of the Home Network (HN) in the authentication or handover protocols. A diligently crafted BAHO authentication protocol, following cryptographic principles, guarantees robust security against the Real-or-Random model. This results in a seamless and secure transition for User Equipment, upholding confidentiality, integrity, and authenticity during handovers between Access Points.