From: RETRACTED ARTICLE: Support attack detection algorithm for recommendation system based on deep learning
Item1
Item2
Item3
…
Itemn
Correlation with Alice
Alice
4
0
3
1.00
User1
0.89
User2
1
2
0.91
Userm
0.86
Attacker1
0.95
Attacker2
0.73
Attackerp
0.90