A Shilling Group Detection Framework Based on Deep Learning Techniques

Table 1

Summary of threat models.

Threat model	IS		IF		IT
	Items	Ratings	Items	Ratings	Rating
GSAGenl Ran	Null		Item is randomly chosen and rated by at most two attackers	System mean	rmax or rmin
GSAGenl Avg	Null		Item is randomly chosen and rated by at most two attackers	Item mean	rmax or rmin
GSAGenl AoP	Null		Item is chosen randomly from x% popular items and rated by at most two attackers	Item mean	rmax or rmin
GSAGenl PIA	Items are randomly chosen from power items and rated by less than three attackers	Item mean	Null		rmax or rmin
GSAGenl GOAT	Items are randomly chosen from popular items rated by active users and rated by less than three attackers	Learned by GAN	Items are randomly chosen from popular items rated by active users and rated by less than three attackers	Learned by GAN	rmax−1