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Table 2 Example user relationship matrix

From: Support attack detection algorithm for recommendation system based on deep learning

 

Alice

User1

User2

Userm

Attacker1

Attacker2

Attackerp

Alice

0

1

0

1

1

0

1

User1

1

0

0

4

0

0

2

User2

0

1

0

1

2

5

5

0

0

Userm

1

0

3

0

3

0

0

Attacker1

1

1

0

0

0

1

1

Attacker2

0

0

1

1

1

0

1

Attackerp

1

1

0

1

0

1

0