Table 2.

Comparison summary of the performance complexity of RBAC, ABAC, and WBAC

Function	Access control model
	RBAC	ABAC	WBAC
Authorization complexity	O(c a r d(R))	O(c a r d(P S) + c a r d(R U))	O(c a r d(a c t r(u s r)) + (c a r d(w) × c a r d(t e a m member)))
Permission modification	$O\left({\sum }_{i\in k}\mathit{card}\right(r_i\left)\right)$	O(c a r d(P S))	$O\left({\sum }_{i\in k}\mathit{card}\right(r_i\left)\right)$
Privilege modification	O(c a r d(U S R))	O(1)	O(c a r d(a u t h r(u s r)) + O(c a r d(t e a m member)))
Revocation	O(c a r d(U S R))	Undefined	O(c a r d(a u t h r(u s r)) + O(c a r d(t e a m member)))
Permission review	O(c a r d(U S R) × c a r d(R))	O(c a r d(P S))	$O\left(\mathit{card}\right({\sum }_{i=1}^n\mathit{card}\left(\mathit{aut}{h}_r\right(\mathit{usr}\left)\right)+\mathit{card}\left(\mathrm{tea}{m}_{\mathrm{member}}\right))$