Privacy Preserving Server-Side Personalized Content Selection

A non-transitory computer readable medium including one or more sequences of instructions that, when executed by one or more processors, cause the processors to perform operations comprising:

• obtaining, by a server device, a plurality of candidate content items, where each candidate content item in the plurality of candidate content items is associated with a content item profile;
• receiving, by the server device, a particular class profile from a user device, the particular class profile approximating a number of similar user profiles representing many different users including a particular user profile of a particular user of the user device;
• generating, by the server device, a content item score for each of the plurality of candidate content items based on the particular class profile and the content item profiles associated with the candidate content items;
• selecting, by the server device, a plurality of selected content items based on the content item scores generated for each candidate content item;
• and
• causing, by the server device, the plurality of selected content items to be presented on a display of the user device.

A system comprising:

• one or more processors;
• and
• a non-transitory computer readable medium including one or more sequences of instructions that, when executed by the one or more processors, cause the processors to perform operations comprising:
• obtaining, by a server device, a plurality of candidate content items, where each candidate content item in the plurality of candidate content items is associated with a content item profile;
• receiving, by the server device, a particular class profile from a user device, the particular class profile approximating a number of similar user profiles representing many different users including a particular user profile of a particular user of the user device;
• generating, by the server device, a content item score for each of the plurality of candidate content items based on the particular class profile and the content item profiles associated with the candidate content items;
• selecting, by the server device, a plurality of selected content items based on the content item scores generated for each candidate content item;
• and
• causing, by the server device, the plurality of selected content items to be presented on a display of the user device.