An Improved Authentication Scheme for Remote Data Access and Sharing Over Cloud Storage in Cyber-Physical-Social-Systems. - Zahid Ghaffar; Shafiq Ahmed; Khalid Mahmood 002; SK Hafizul Islam; Mohammad Mehedi Hassan; Giancarlo Fortino (IEEE Access, 2020)

An anonymous authenticated key-agreement scheme for multi-server infrastructure. - Muhammad Arslan Akram; Zahid Ghaffar; Khalid Mahmood 002; Saru Kumari; Kadambri Agarwal; Chien-Ming Chen 001 (Hum. centric Comput. Inf. Sci., 2020)

Provably Secure Authentication Protocol for Mobile Clients in IoT Environment Using Puncturable Pseudorandom Function. - Muhammad Asad Saleem; Zahid Ghaffar; Khalid Mahmood 002; Ashok Kumar Das; Joel J. P. C. Rodrigues; Muhammad Khurram Khan (IEEE Internet Things J., 2021)

Security Analysis on "A Secure Three-Factor User Authentication Protocol With Forward Secrecy for Wireless Medical Sensor Network Systems". - Muhammad Asad Saleem; Salman Shamshad; Shafiq Ahmed; Zahid Ghaffar; Khalid Mahmood 002 (IEEE Syst. J., 2021)

Signcryption Based Authenticated and Key Exchange Protocol for EI-Based V2G Environment. - Shafiq Ahmed; Salman Shamshad; Zahid Ghaffar; Khalid Mahmood 002; Neeraj Kumar 001; Reza M. Parizi; Kim-Kwang Raymond Choo (IEEE Trans. Smart Grid, 2021)

Provable Secure Identity-Based Anonymous and Privacy-Preserving Inter-Vehicular Authentication Protocol for VANETS Using PUF. - Muhammad Umar; SK Hafizul Islam; Khalid Mahmood 002; Shafiq Ahmed; Zahid Ghaffar; Muhammad Asad Saleem (IEEE Trans. Veh. Technol., 2021)

A seamless anonymous authentication protocol for mobile edge computing infrastructure. - Khalid Mahmood 002; Muhammad Faizan Ayub; Syed Zohaib Hassan; Zahid Ghaffar; Zhihan Lv; Shehzad Ashraf Chaudhry (Comput. Commun., 2022)

Security analysis on "EAKE-WC: Authenticated Key Exchange Protocol for Wearable Computing". - Zahid Ghaffar; Khalid Mahmood 002; Muhammad Farooq 004; Khalid Yahya; Chien-Ming Chen 001; Shehzad Ashraf Chaudhry (ICEA, 2023)

A Lightweight and Efficient Remote Data Authentication Protocol Over Cloud Storage Environment. - Zahid Ghaffar; Salman Shamshad; Khalid Mahmood 002; Mohammad S. Obaidat; Saru Kumari; Muhammad Khurram Khan (IEEE Trans. Netw. Sci. Eng., 2023)

Cloud-Assisted Secure and Cost-Effective Authenticated Solution for Remote Wearable Health Monitoring System. - Khalid Mahmood 002; Mohammad S. Obaidat; Zahid Ghaffar; Bander A. Alzahrani; Salman Shamshad; Muhammad Asad Saleem; Shafiq Hussain (IEEE Trans. Netw. Sci. Eng., 2023)

Secure authentication protocol for home area network in smart grid-based smart cities. - Hafiz Muhammad Sanaullah Badar; Khalid Mahmood 002; Waseem Akram 003; Zahid Ghaffar; Muhammad Umar; Ashok Kumar Das (Comput. Electr. Eng., 2023)

Design of Provably Secure Authentication Protocol for Edge-Centric Maritime Transportation System. - Khalid Mahmood 002; Salman Shamshad; Muhammad Faizan Ayub; Zahid Ghaffar; Muhammad Khurram Khan; Ashok Kumar Das (IEEE Trans. Intell. Transp. Syst., 2023)

Robust and efficient three-factor authentication solution for WSN-based industrial IoT deployment. - Khalid Mahmood 002; Muhammad Asad Saleem; Zahid Ghaffar; Salman Shamshad; Ashok Kumar Das; Mohammed J. F. Alenazi (Internet Things, 2024)

A Neural Computing-Based Access Control Protocol for AI-Driven Intelligent Flying Vehicles in Industry 5.0-Assisted Consumer Electronics. - Khalid Mahmood 002; Tayyaba Tariq; Arun Kumar Sangaiah; Zahid Ghaffar; Muhammad Asad Saleem; Salman Shamshad (IEEE Trans. Consumer Electron., 2024)

A Security Enhanced Chaotic-Map-Based Authentication Protocol for Internet of Drones. - Khalid Mahmood 002; Zahid Ghaffar; Muhammad Farooq 004; Khalid Yahya; Ashok Kumar Das; Shehzad Ashraf Chaudhry (IEEE Internet Things J., 2024)

A Machine Learning Attack Resilient and Low-Latency Authentication Scheme for AI-Driven Patient Health Monitoring System. - Zahid Ghaffar; Wen-Chung Kuo; Khalid Mahmood 002; Tayyaba Tariq; Ali Kashif Bashir; Marwan Omar (IEEE Commun. Stand. Mag., 2024)

A Privacy-Preserving Access Control Protocol for Consumer Flying Vehicles in Smart City Applications. - Khalid Mahmood 002; Zahid Ghaffar; Lata Nautiyal; Muhammad Wahid Akram; Ashok Kumar Das; Mohammed J. F. Alenazi (IEEE Internet Things J., 2025)

A Cost-Effective Key Agreement Encryption Protocol for Securing IIoT-Enabled WSN Communication. - Khalid Mahmood 002; Mah Noor Fatima; Salman Shamshad; Zahid Ghaffar; Ashok Kumar Das; Mohammed J. F. Alenazi (IEEE Internet Things J., 2025)

Provably Secure Authenticated Key-Management Mechanism for e-Healthcare Environment. - Muhammad Asad Saleem; Xiong Li 002; Khalid Mahmood 002; Zahid Ghaffar; Yong Xie 003; Guijuan Wang (IEEE Internet Things J., 2025)

A Lightweight and Robust Access Control Protocol for IoT-Based e-Healthcare Network. - Zahid Ghaffar; Wen-Chung Kuo; Khalid Mahmood 002; Tayyaba Tariq; Salman Shamshad; Ashok Kumar Das; Mohammed J. F. Alenazi (IEEE Trans. Mob. Comput., 2025)