Key Updating Methods for Combinatorial Design Based Key Management Schemes

Table 1

An example of a 2-(9,3,1) unital design.

	𝐵1	𝐵2	𝐵3	𝐵4	𝐵5	𝐵6	𝐵7	𝐵8	𝐵9	𝐵10	𝐵11	𝐵12
𝐸1	1					1	1				1
𝐸2						2		2	2	2
𝐸3			3	3			3	3
𝐸4	4			4	4				4
𝐸5					5		5			5		5
𝐸6			6						6		6	6
𝐸7		7	7		7	7
𝐸8	8	8						8				8
𝐸9		9		9						9	9