[1] Bacha Khan Univ, Dept Comp Sci, Charsadda 24000, Pakistan
[2] Univ Malaya, Fac Comp Sci & Informat Technol, Kuala Lumpur 50603, Malaysia
[3] Univ Malaysia Sabah, Fac Comp & Informat, Labuan 88400, Malaysia
[4] Univ Warwick, Secure Cyber Syst Res Grp, WMG, Coventry CV4 7AL, W Midlands, England
[5] Alan Turing Inst, London NW1 2DB, England
[6] Wuhan Univ, Sch Comp Sci, Wuhan 430072, Peoples R China
[7] Mohi Ud Din Islamic Univ, Dept Comp Sci, Nerian Sharif 12080, Pakistan
[8] Inst Space Technol, Dept Comp Sci, Islamabad 44000, Pakistan