Vehicular Ad Hoc Networks (VANETs) are a significant component of upcoming intelligent transportation systems. VANETs improve road safety by sending danger alerts to drivers; therefore, their messages must be secure and unaltered. Digital signatures are used to verify the integrity and authenticity of transmitted messages; however, existing digital signature-based schemes require a high computational time owing to the repeated use of mathematical operations. To address this issue, a novel signature aggregation and key management (LAAS-KM) scheme is proposed in this paper to reduce the computational cost without compromising security. First, the LAAS-KM allows roadside infrastructure to cluster multiple vehicle signatures into a compact signature to reduce the large computational overhead during the verification process. Moreover, LAAS-KM supports group communication with novel key management to update keys as vehicles move and network topologies change dynamically in VANETs. Moreover, the security analysis section indicates that the LAAS-KM can prevent various security attacks, including impersonation and replay attacks. Furthermore, a formal security analysis is performed using the Scyther tool to validate the critical security properties of LAAS-KM. Performance evaluations show that LAAS-KM outperforms traditional schemes in terms of communication and computation overheads. Finally, a practical simulation is performed using MATLAB, and the performance metrics are analyzed.

Vehicular ad-hoc networks (VANETs) have become the predominant technology in the current era. Although VANETs have numerous benefits, they are prone to different types of attacks owing to their open nature. Therefore, security plays a crucial role in VANET systems. Ensuring a safe and dependable vehicular communication system is crucial when performing anonymous authentication and group key agreement. Many related works have been proposed based on signature aggregation and group key management; however, they suffer from high computational and communication costs. Hence, in this work, signature aggregation scheme is proposed in such a way that the computational overhead is significantly reduced. Moreover, an ECC-based group management scheme is proposed to secure group communication. In comparison to recent works, the proposed work generates and verifies signatures with an efficiency of 50.03% and 26.26%, respectively. Furthermore, 72.32% and 35.45% efficient in terms of transmission overhead and serving ratio when compared to recent works. To validate this work practically, printed antenna consisting of four elements arranged in a linear array is developed for the intended use. Security analysis is performed in formal and informal ways to prove the security strength of the proposed method. Finally, the performance is validated with similar works using the Cygwin platform with the PBC library.

Ensuring the safe transfer of information plays an important role in the development of Industry 4.0. Robust authentication and security frameworks are required to establish confidence among vehicles, provide reliable data flow, and improve the overall safety of vehicle platoons. This is crucial for preventing cyber-attacks that could cause accidents or disrupt the synchronized movement of vehicle platoons. Initially, in this study, a novel privacy-preserving mechanism based on an authentication code and cipher test is suggested. Second, an effective authentication system is proposed for vehicle platoons. Third, a novel tree-based group key-sharing mechanism for the exchange of information between vehicle users is proposed. The proposed scheme also supports the sharing of the same group key for entities in Industry 4.0. Finally, a planar array consisting of four elements was specifically built for use in vehicular ad hoc network (VANET) applications operating inside the Dedicated Short-range Communications (DSRC) (802.11p) band to prove the efficacy in terms of practical implementation. To assess the security level of the suggested authentication scheme, both formal and informal analyses were conducted. Finally, the performance of the suggested protocol is evaluated in terms of computational and communication overheads. Moreover, the designed antenna provides complete impedance bandwidth coverage, good gain, and minimal cross-polarization suppression at the optimum frequency of operation in the C band.

For Wireless Body Area Networks (WBANs), the security of sensitive data of patients is of the utmost importance, particularly in healthcare environments. This study presents a novel methodology for improving the efficacy of signature aggregation in a scenario involving doctors and patients while mitigating concerns about location privacy. Though there have been prior proposals for signature aggregation schemes, the proposed approach seeks to optimize the aggregation process within the considered scenario, thereby improving performance and reducing computational and communication burden. In addition, the proposed scheme integrates a resilient mechanism that safeguards the doctor’s location privacy by utilizing the Chinese Remainder Theorem (CRT). Advanced cryptographic algorithms and location-anonymization techniques are employed in the proposed method to safeguard the confidentiality of the doctors’ location. The security of the proposed scheme is formally analyzed using the Burrows-Abadi-Needham (BAN) logic and formally verified using the automated software validation tool, known as the Scyther tool, and an informal analysis of various security attributes confirms the security robustness of the proposed scheme. The efficacy is evaluated in comparison to analogous works utilizing the Cygwin software. The performance evaluation shows that the proposed scheme has lower communication costs as compared to existing competing schemes. Moreover, the serving ratio in the proposed scheme is high even if the number of patients is low for doctors.

Summary Vehicular ad‐hoc networks (VANETs) have gained significant attention in recent years due to their potential to improve the safety and efficiency of transportation systems. VANETs are a type of wireless ad‐hoc network that enables communication between vehicles and between vehicles and roadside infrastructure. VANETs can also improve the efficiency of transportation systems by reducing traffic congestion and improving traffic flow. In addition to improving safety and efficiency, VANETs also face several challenges. One of the biggest challenges is ensuring the security and privacy of the data transmitted over the network. In this manuscript, an anonymous authentication scheme for VANET users is proposed along with privacy preservation and confidentiality. An efficient session key agreement protocol is designed for transferring location‐based information between the vehicle user and the roadside unit (RSU). Further, updated session keys are transferred to the subsequent RSU, when the vehicle user moves to another location. Moreover, re‐authentication of VANET users is completely evaded during to handover authentication, thus reducing the computational overhead. In addition, Resistance to different security assaults is discussed in this work through informal analysis. Finally, performance is compared with different relevant schemes and validated through Cygwin software.

The progression of cloud computing, IoT technologies, and intelligent transportation systems has accelerated the speedy growth of vehicular ad-hoc networks (VANETs). Recently, attempts have been made to merge fog computing with VANETs to meet the needs of the real world, such as mobility, low transmission delay, etc. In this work, the VANET system is divided into several fog domains to reduce the burden on the central cloud server. Moreover, hybrid CMOS memristor-based biometric authentication is introduced to ensure only registered users can enable the OBU for making communications in VANETs. The proposed work achieves anonymous mutual authentication to validate the legitimacy and privacy of vehicle users while making communications in VANETs. The formal and informal security analyses are given in this paper to prove that the proposed work encounters the necessities of security in fog-based vehicular ad-hoc networks. In addition, the security of the proposed work is evaluated using the Scyther tool to show that the proposed scheme is highly robust against various attacks. Finally, we conduct a performance evaluation of the proposed work with other related works. The findings indicate that, in comparison to other related works, the proposed work offers a better trade-off between security and performance.

Nowadays, continuous monitoring of a patient’s healthcare data has become a critical factor in human well-being. However, with the rapid advancement of wireless technology, doctors and healthcare professionals can monitor the patient’s healthcare data in real time. But to access the confidential patient’s data which is transferred through the open wireless medium, the secure transmission plays an important role. In this work, the privacy and the anonymity of the end-users (patient/doctor) are preserved using an anonymous blockchain-based authentication scheme. Moreover, in this work initially, mutual authentication is performed between the end-users, followed by encryption and decryption of confidential data. In addition, to avoid reauthentication of the patient again during the movement of a patient from one doctor to another, a transfer authentication protocol is performed between the doctors which enhances performance analysis. The security analysis section illustrates the withstanding capability of the proposed work against various vulnerable attacks. Finally, performance investigation of the proposed work reveals a reduction in computational and communication costs when compared to existing related works.

The recent developments in the wireless body area networks (WBAN) play a vital role in the modern remote health care monitoring system. In WBAN, the deployed intelligent, resource-limited body sensors will collect the patient's biological information (BI) and communicate the same to the doctor for further action through the Internet. But during the communication among the WBAN entities, the privacy, security of the BI, and user's personal data need to be protected against various security threats. To address these security flaws, in this article, a computationally efficient privacy-preserving anonymous authentication scheme is proposed for resource-limited WBAN. Also, it preserves the physical security of sensors and the confidentiality of BI and provides conditional privacy to the WBAN users. The comprehensive security and performance evaluation phase ensures that the proposed scheme is efficient and secure in terms of computational and communication complexity when compared with the other conventional schemes.

Abstract Automatic Dependent Surveillance‐Broadcast (ADS‐B) system provides significant improvements in air traffic control system such as optimal routing in non‐radar environments with a new level of safety and efficiency. The ADS‐B system is being installed in many aircrafts in recent year. The ADS‐B equipped aircraft broadcasts the air traffic information to nearby aircraft and ground stations either once or twice per second. Because of the open channel communication atmosphere, the ADS‐B system is affected by many security attacks. Many authentication and batch verification schemes are available to provide data integrity and source authentication for the ADS‐B system. But they are suffering from computational overhead and communication overhead. Hence, an efficient anonymous authentication scheme is proposed for the ADS‐B system with batch verification based on Message Recovery Signature (MRS). The security and performance analysis section ensure that the proposed scheme provides essential security features with less computational and communication overhead comparison with the other existing schemes.