Facilitating entity resolution via secure entity resolution database

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

• receiving, by an entity resolution computing device, a resolution request from a client computing device, the resolution request comprising a first encrypted index generated from a first identity data object and a second encrypted index generated from a second identity data object stored in a client identity database accessible by the client computing device;
• identifying, by the entity resolution computing device and from an encrypted identity data repository, a first encrypted data object that matches the first encrypted index and a second encrypted data object that matches the second encrypted index, the encrypted identity data repository comprising encrypted data objects and associated common entity identifiers, each common entity identifier associated with two or more encrypted data objects that correspond to a common entity;
• determining, by the entity resolution computing device, that the first encrypted data object and the second encrypted data object correspond to a common entity;
• in response to determining that the first encrypted data object and the second encrypted data object correspond to the common entity, retrieving, by the entity resolution computing device, a common entity identifier associated with the first encrypted data object and the second encrypted data object;
• and
• transmitting, by the entity resolution computing device, the common entity identifier to the client computing device, the common entity identifier causing the client computing device to update the client identity database by linking the first identity data object and the second identity data object via the common entity identifier.

A system comprising:

• one or more storage devices for storing an encrypted identity data repository, the encrypted identity data repository comprising encrypted data objects and associated common entity identifiers, each common entity identifier associated with two or more encrypted data objects that correspond to a common entity;
• a processor;
• and
• a non-transitory computer-readable medium comprising instructions that are executable by the processor to cause the system to perform operations comprising:
• receiving a resolution request from a client computing device, the resolution request comprising a first encrypted index generated from a first identity data object and a second encrypted index generated from a second identity data object stored in a client identity database accessible by the client computing device;
• identifying, from the encrypted identity data repository, a first encrypted data object that matches the first encrypted index and a second encrypted data object that matches the second encrypted index;
• determining that the first encrypted data object and the second encrypted data object correspond to the common entity;
• in response to determining that the first encrypted data object and the second encrypted data object correspond to a common entity, retrieving a common entity identifier associated with the first encrypted data object and the second encrypted data object;
• and
• transmitting the common entity identifier to the client computing device, the common entity identifier causing the client computing device to update the client identity database by linking the first identity data object and the second identity data object via the common entity identifier.