Private association of customer information across subscribers

A method comprising:

• obtaining, by a context service system from a subscriber, a request including at least one element of a data record, the context service system stores contextual information of the subscriber in a form of attributes that are sharable with other subscribers;
• generating, by the context service system, a response by applying an oblivious pseudo random function (OPRF) to the at least one element;
• and
• providing, by the context service system to the subscriber, the response which is applied by the subscriber to compute at least one blinded attribute corresponding to the at least one element and sharable with the other subscribers to obtain an association between the at least one element and at least one other element of the data record, wherein a shared data partition stores the at least one blinded attribute obtained from the data record in a data partition of the subscriber in association with at least one other blinded attribute obtained from at least one other data partition of the other subscribers.

An apparatus comprising:

• a communication interface configured to enable network communications on a network;
• a memory configured to store executable instructions;
• and
• a processor coupled to the communication interface and the memory and configured to:
• obtain, via the communication interface, from a subscriber, a lookup request including a first blinded attribute, the first blinded attribute obtained by applying an oblivious pseudo random function (OPRF) to a first element of a data record;
• identify at least one second blinded attribute associated with the first blinded attribute in a shared data partition of a storage system that stores contextual information of the subscriber in a form of attributes that are sharable with other subscribers, wherein the shared data partition includes the first blinded attribute obtained from a first subscriber data partition of the subscriber and the at least one second blinded attribute obtained from at least one second subscriber data partition of the other subscribers;
• and
• provide at least one second element of the data record associated with the at least one second blinded attribute.