PRUB: A Privacy Protection Friend Recommendation System Based on User Behavior

Table 1

Abilities of defending against attacks.

Protocols	Passive attack	Scenario 1	Scenario 2	Scenario 3
PRUB	√	√	√	√
Xie and Hengartner [6]	√	×	√	√
Agrawal et al. [7]	√	×	×	×