Query Privacy Preserving for Data Aggregation in Wireless Sensor Networks

Algorithm 2

The key generation.

	Input: security parameter, ; query types, .
	Output: key sets ().
(1)	Begin
(2)	Generate a tuple
(3)	Find random -bit primes
(4)	Let
(5)	Find a set of elliptic curve points
(6)	Generate a tuple ()
(7)	For node
(8)	Choose points from
(9)
(10)	For query ()
(11)	, ,
(12)
(13)
(14)	End For
(15)	End For
(16)	Return ().
(17)	End