An Efficient ECC-Based Authentication Scheme against Clock Asynchronous for Spatial Information Network

Table 4

Operations and communication cost comparison among related schemes.

	Ours	Altaf et al. [22]	Sharif et al. [21]
Registration phase	1	2 + 1	2 + 2
Login and authentication phase	5 + 2 + 2	7 + 4 + 2	7 + 5 + 3
Total execution time	4198.726 µs	4399.089 µs	6598.089 µs
Communication cost bits	1440	1440	2112