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Table 4 Computation cost comparison in login and authentication phase

From: An improved authenticated key agreement protocol for telecare medicine information system

 

Islam and Khan (2014)

Zhang and Zhou (2015)

Chaudhry et al. (2015)

Vanga et al. (2015)

Ours

Computational cost

6T m  + 1T a  + 10T h

6T m  + 2T s  + 11T h

7T m  + 8T h

5T m  + 3T s  + 13T h

6T m  + 4T s  + 11T h

Estimated time (ms)

13.4078

13.3905

15.6004

13.4767

13.3997

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