Correction to: A group key-based lightweight Mutual Authentication and Key Agreement (MAKA) protocol for multi-server environment

1 Correction to: The Journal of Supercomputing https://doi.org/10.1007/s11227-021-04114-7

In this article, the legend for Figs. 7 and 8 was wrong; the figures should have appeared as shown below.

Figure 7.

Fig. 7

Execution time (in logarithmic scale)

Figure 8.

Fig. 8

Communication cost (in normal scale)

The original article has been corrected.