26、社交网络隐私保护：从节点匿名到信息防学习

社交网络隐私保护：从节点匿名到信息防学习

1. 安全分组生成算法

在社交网络隐私保护中，安全分组是重要的基础步骤。以下是生成安全分组的算法：

Algorithm 5: Generate safe groups
1 while |V| > 0 do
2     us = the node with maximum degree in V;
3     V = V - {us};
4     group g = new group {us};
5     C = C ∪ {g};
6     while |g| < k do
7         Set candidates = {};
8         for Each node u in V do
9             if Adding u into g does not violate SGC then
10                candidates = candidates ∪ {u};
11         if |candidates| > 0 then
12             for Each node u in candidates do
13                 u.cost = the cost to add u into g;
14             u0 = u in candidates with minimum u.cost;
15             g = g ∪ {u0}; V = V - {u0};
16         else
17             break;
18     fo