Technology is disclosed for identifying dynamic groups that correspond to a user of a system. A system partitions a set of dynamic groups into multiple test sets of dynamic groups. The system selects a test set and determines whether the user corresponds to the test set. In one implementation, the system...http://www.google.com.hk/patents/US20070168530?utm_source=gb-gplus-share專利 US20070168530 - IDENTIFYING DYNAMIC GROUPS
