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126 |                                                                                        Rashid et al.

                                                          TABLE II.
                                         COMPARISON OF SECURITY FEATURES

          Mutual Authentication          [v22] v[13] [v15] [23] [22] v[11] vProposed Scheme

          Anonymous Untraceable          v v v ×v v× v v

          Forward Secrecy                         v vvvv

          Unlinkability                  × v× v v v v

          Impersonal attack              ××                                  v

          Protected from a Stolen PDi Attack × v× v× v× ×v ×v v
          Insider Attack                 × vvvv

          Key Agreement and Freshness    v× ×v ×v v v v v

          MITM Attack                    vvvvvvv

          Replay Attack                                  vvv

          DoS Attack DDos                ×v v× ×v ×                          v

          Eavesdropping Attack           vvv× × × v

          Forged Sensor                                  ×××

          Smart Factor                   × × × ×v v× × ×v
          Healthcare                     ×××                              ×

                         TABLE III.                      number of devices and users grows, it becomes increasingly
       COMPARISON OF COMPUTATIONAL COST                  difficult to manage and maintain the authentication infrastruc-
                                                         ture. The complex is a difficult for users to understand and
Scheme Registration      Login and Total Cost            implement them. This can lead to a low adoption rate and a
         Phase                                           lack of trust in the system.
                         Authentication
[22] 2Th+ 1T                                                           CONFLICT OF INTEREST
                         Phases
[13] 1Th+                                                   The authors have no conflict of relevant interest to this
         2T +1T||        13Th+6T         15Th+7T         article.
                                         ˜0.0345
[14] 2Th+ 6T                                                                  REFERENCES
                         8Th+13T +16T|| 9Th+15T +17T||
Our 3Th+ T                                     ˜0.0207    [1] O. Ali, M. K. Ishak, M. K. L. Bhatti, I. Khan, and K.-
                                                               I. Kim, “A comprehensive review of internet of things:
                         16Th+29T        18Th+35T ˜            Technology stack, middlewares, and fog/edge computing
                                         0.0414                interface,” Sensors, vol. 22, no. 3, p. 995, 2022.

                         4Th+2T +2T|| 7Th+3T +2T||        [2] L. Babangida, T. Perumal, N. Mustapha, and R. Yaakob,
                                               ˜ 0.0161        “Internet of things (iot) based activity recognition strate-
                                                               gies in smart homes: A review,” IEEE Sensors Journal,
                 TABLE IV.                                     vol. 22, no. 9, pp. 8327–8336, 2022.
          COMMUNICATION COST
                                                          [3] V. Mohindru, S. Vashishth, and D. Bathija, “Internet of
Communication [22]        [13]     [14]  Proposed              things (iot) for healthcare systems: A comprehensive
                                         Scheme                survey,” Recent Innovations in Computing: Proceedings
Link                      200      232   384 bits              of ICRIC 2021, Volume 1, pp. 213–229, 2022.
                          bits     bits
Si ? PDi  192             328      232   384 bits         [4] C. Bayilmis¸, M. A. Ebleme, U¨ . C¸ avus¸og?lu, K. Ku¨cu¨k,
                          bits     bits                        and A. Sevin, “A survey on communication protocols
          bits            320      192   128 bits              and performance evaluations for internet of things,”
                          bits     bits                        Digital Communications and Networks, vol. 8, no. 6,
PDi ? AS  320             192      192   -                     pp. 1094–1104, 2022.
                          bits     bits
          bits            1040     848   896 bits
                          bits     bits
AS? PDi   320

          bits

PDi ? Si  192

          bits

Total     1024

          bits
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