On Constructing Dynamic and Forward Secure Authenticated Group Key Agreement Scheme from Multikey Encapsulation Mechanism

Table 1

Efficiency comparison of GAKE construction from different KEMs.

Scheme

Assumption

Initiation

Key exchange performance for participants

SM

MSM

Key size; pk/sk

Computation

Key calculation

Total; ≈SM

Total KDF/Hash

SM

MSM

KDF/Hash

SM

MSM

KDF/Hash

PSEC [7]

CDH

1

—

2/1

—

—

ELGamal [5]

CDH

1

—

2/1

—

—

CS98 [8]

DDH

1

2

5/5

HK07 [9]

HDDH

3

—

4/3

2

—

HTAS-CKS [10]

HDDH

—

3

5/5

2

HTAS-HK [10]

HDDH

2

—

4/4

2

—