Table 7.

Cryptographic Operations Utilised in the Signcryption Phase.

Authors and Ref. No.	Signcryption
Amin et al. [80]	$3 \mathcal{SPMEC}$
Wang and Liu [69]	$1 \mathcal{EXP} +1 \mathcal{BPM} +1 \mathcal{P}$
Li and Hong [70]	$2 \mathcal{EXP}$
Jawaid et al. [83]	$4 \mathcal{HCDM}$
Mutaz et al. [71]	$5 \mathcal{BPM} +1 \mathcal{EXP}$
Lu et al. [72]	$2 \mathcal{BPM} +11 \mathcal{EXP} +1 \mathcal{P}$
Li et al. [73]	$4 \mathcal{BPM} +1 \mathcal{EXP}$
Prameela & Ponmuthuramalingam [74]	$2 \mathcal{EXP}$
Omala et al. [75]	$3 \mathcal{BPM}$
Omala et al. [81]	$3 \mathcal{SPMEC}$
Gao et al. [82]	$3 \mathcal{SPMEC}$
Ullah et al. [84]	$4 \mathcal{HCDM}$
Jawaid et al. [76]	$5 \mathcal{BPM} +1 \mathcal{EXP}$
Noor et al. [85]	$4 \mathcal{HCDM}$
Hu et al. [77]	$2 \mathcal{EXP}$