Facilitating entity resolution, keying, and search match without transmitting personally identifiable information in the clear

An entity resolution server comprising:

• a processor;
• and
• a non-transitory computer-readable memory comprising:
• a data structure;
• a database engine to configure the data structure into an entity-resolution data structure by correlating data objects that refer to a common entity, each of the data objects comprising a plurality of data fields, wherein each data field of the plurality of data fields identifies an entity, the entity-resolution data structure comprising:
• a first data object;
• a second data object that includes a common data field from the first data object, wherein the first data object and the second data object refer to the common entity;
• and
• a variant data object comprising a modified version of a data field of the plurality of data fields that matches the common entity,
• wherein the database engine is further configured to perform operations comprising:
• updating an identity data repository containing account or transaction data from which the plurality of data fields of the data objects are obtained to form an updated identity data repository that includes an entity identifier that links the first data object to the second data object and that indicates that the first data object and the second data object refer to a common entity, wherein the entity-resolution data structure is created from the updated identity data repository;
• and
• instructions that are executable by the processor to cause the processor to perform operations comprising:
• generating an encrypted entity-resolution data structure by encrypting the entity-resolution data structure;
• and
• causing the encrypted entity-resolution data structure to be transmitted to a client computing system for the client computing system to identify matching data stored in the encrypted entity-resolution data structure based on existing data objects within client data accessible to the client computing system.

A method that includes one or more processing devices performing operations comprising:

• correlating a first data object with a second data object from an identity data repository storing account or transaction data regarding entities, each of the first data object and the second data object comprising a plurality of data fields derived from the account or transaction data, wherein each data field of the plurality of data fields identifies an entity, and wherein correlating is performed based on the first data object and the second data object including a common data field;
• updating the identity data repository to form an updated data repository that includes an entity identifier that links the first data object to the second data object and that indicates that the first data object and the second data object refer to a common entity;
• creating an entity-resolution data structure having the first data object with the entity identifier and the second data object with the entity identifier from the updated data repository;
• generating a new variant data object based on a modified version of the account or transaction data that is determined to match the common data field;
• updating the entity-resolution data structure to form an updated entity-resolution data structure by adding the new variant data object to the entity-resolution data structure;
• generating an encrypted entity-resolution data structure by encrypting the updated entity-resolution data structure;
• and
• causing the encrypted entity-resolution data structure to be transmitted to a client computing system for the client computing system to identify matching data stored in the encrypted entity-resolution data structure based on existing data objects within client data accessible to the client computing system.