MULTI-STAGE DATA FILTERING SYSTEM

摘要

A data filtering system is provided that filters data in multiple stages. The system provides a first filter criteria (18) to a first device (10). The first device (10) uses the first filter criteria (18) to generate a first set of filtered data (22). The system receives the first set of filtered data (22) from the first device (10) and filters the received data based on a second filter criteria (26), which is different from the first filter criteria (18). The filtering of the first set of filtered data (22) generates a second set of filtered data (30). The first filter criteria (18) and the second filter criteria (26) can be included in a profile data set (24). The profile data set (24) may be associated with a particular data recipient. The first filter criteria (18) contains public profile data and the second filter criteria contains private profile data. The profile data set may contain data elements associated with a particular class (86) of data recipients or a particular data recipient role (84). The data filtering system can be implemented such that the first device is an untrusted filtering device (100) and the second device is a trusted filtering device (102).