Visa Inc.
Increasing search ability of private, encrypted data

Abstract:

Techniques are provided to allow full search for encrypted data within a database. In some embodiments, searchable data may be separated into different searchable tables in a database in such a way that encrypted data is stored as plaintext but has no usable link to other data within the source database. In some embodiments, performing a query on a particular user data may result in the retrieval of an encrypted identifier, which may then be decrypted via an encryption module. A second search based on the decrypted identifier may produce a set of relevant search results from a source table.