Table 1.

Comparisons on latency needed to set up packet key-based session.

Models	Latency to Setup a Secure Session
Proposed BSM model	2$T_{Intra}$ ((1), (2) in Figure 7)
	1$T_{BVV}$ ((3) in Figure 8)
	1$T_{GinB}$ ((4)+(5)+(6)+(7) in Figure 8)
	($2T_{Intra}+1T_{BVV}+1T_{GinB}$)
Non-scalable BSM model	2$T_{Intra}$ ((1), (2) in Figure 13)
	1$T_{E2E}$ ((3) in Figure 13)
	2$T_{Intra}$ ((4), (5) in Figure 13)
	($4T_{Intra}$ + 1$T_{E2E}$)
Vertical model	2$T_{E2E}$: ((b), (d) in Figure 12)
	2$T_{BVV}$ ((a), (c) in Figure 12)
	($2T_{E2E}+2T_{BVV}$)