Table 2.

Comparison of security features table.

Protocol	ST1	ST2	ST3	ST4	ST5	ST6	ST7	ST8	ST9	ST10
Alladi 2020 [21]	🗸	🗸	🗸	🗸	🗸	🗸	✕	🗸	🗸	✕
Kwon 2021 [45]	🗸	🗸	🗸	🗸	🗸	🗸	✕	🗸	🗸	🗸
Chen 2021 [46]	🗸	🗸	🗸	🗸	🗸	✕	✕	🗸	🗸	🗸
Raque 2022 [47]	🗸	🗸	🗸	🗸	🗸	🗸	✕	🗸	🗸	🗸
Our	🗸	🗸	🗸	🗸	🗸	🗸	🗸	🗸	🗸	🗸

ST1: Mutual authentication; ST2: Identity anonymity and untraceability; ST3: Resist tampering attacks; ST4: Resist repaly attacks; ST5: Resist simulation and forgery attacks; ST6: No clock synchronization; ST7: Resist physical attacks; ST8: Forward and backward security of session keys; ST9: Resist internal attacks; ST10: Resist desynchronization attacks.