Privacy Protection of Social Networks Based on Classified Attribute Encryption

Algorithm 4

Encryption algorithm (En).

	Input: BLori
	Output: BLen
(1)	for (i = 1; n; i++)
(2)	map[i] = random (1, n)//Return an integer type random number between 0 and 1;
(3)	end for (i = i; n; i++)
(4)	for (i = i; n; i++)
(5)	RegStat[0] = (rand() << 17) | (rand() << 3) | (rand()); //Generate random number store in the register;
(6)	RegStat[0]take as seed, and generate pseudorandom number sequence PRS = (p1, p2, …, pn);
(7)	for (j = 1; n; j++)
(8)	RegStat[j] = bji  pj;
(9)	RegStat[map[t]] = RegSta[i]; //Rearrangement of registers by mapping table
(10)	end for
(11)	for (k = 1; n; k++)
(12)	add RegStat[k] to the K record of BLen.
(13)	end for
(14)	end for