Secure Collaborative Key Management for Dynamic Groups in Mobile Networks

Table 1

Communication and computation costs.

		Rounds	Messages	Exponentiations	Signatures	Verifications
GDH	Join, merge	m + 3	n + 2m + 1	n + 2m + 1	m + 3	n + 2m + 1
	Leave	1	1		1	1
	Partition	2	p + 1		2	p
	Master leave	2			2
STR	Join	3	m + 2	3m	2	m + 2
	Leave	1	1		1	1
	Merge	3	3		2	3
	Partition	2	3		2	3
TGDH	Join, merge	2	3		2	3
	Leave, partition	h	2h		h
BD	Join, merge	2	2n + 2m	3	2
	Leave	2		3	2
	Partition	2	2n	3	2
CKD	Join, merge	3	m + 2	n + 2m	3	m + 2
	Leave	1	1		1	1
	Partition	3	p + 2	,	3	4
	Master leave	3	n		3	n
CODH	Join	2	m + 1	n + m + 1	2	m + 1
	Leave	1	1		1	1
	Merge	2	2		2	2
	Partition	2	3		2	2
	Master leave	2	2		2	2