Research Article

A Blockchain-Based Hierarchical Authentication Scheme for Multiserver Architecture

Table 9

Communication overhead comparison.

Our schemeKou et al.’s scheme [2]Ying and Nayak’s scheme [36]Xiong et al.’s scheme [11]He and Wang’s scheme [4]Odelu et al.’s scheme [5]

Rounds of message exchange322255
Number of bits required198415681632156835202944