Practical KGC-Free Polynomial-Based Multiple Group Keys Agreement for IoT Health Care Systems

Table 3

Comparison with latest multigroup key establishment protocols.

	Park et al. [34]	Hsu et al. [38]	Naresh et al. [37]	Ours
Multiple group keys establishment at one time	Yes	Yes	Yes	Yes
Trusted server needed	Yes	Yes	Yes	No
Computations for encryption and decryption	RSA-based	Polynomial-based	Elliptic curve cryptography- (ECC-) based	Polynomial-based
Rekeying overhead needed	Yes	No	Yes	No