Method and system for double anonymization of data

A system for double anonymization of data, comprising:

• a first computing system;
• and
• a second computing system, wherein
• first computing system is configured to
• receive, by a receiving device of the first computing system, a plurality of first data sets, each first data set including at least a set identifier and including personally identifiable information, each first data set including data related to an electronic payment transaction, each set identifier included in each first data set being a primary account number used in the related electronic payment transaction, and the personally identifiable information included in each first data set comprising the related primary account number,
• anonymize each of the first data sets, wherein anonymizing includes at least replacing the set identifier included in each first data set with a hashed identifier and deidentifying the personally identifiable information, where the hashed identifier is generated via the application of one or more hashing algorithms to at least the corresponding set identifier,
• responsive to and subsequent to deidentifying the personally identifiable information, discard the personally identifiable information, and
• electronically transmit, by a transmitting device of the first computing system, the plurality of anonymized first data sets to a receiving device of a second computing system, wherein the second computing system is distinct and separate from the first computing system, and
• the second computing system is configured to anonymize each of the anonymized first data sets, wherein anonymizing includes at least replacing the hashed identifier with a double-hashed identifier, the double-hashed identifier being generated via application of one or more hashing algorithms to at least the corresponding hashed identifier, wherein
• the plurality of double anonymized first data sets is stored in the second computing system or in a distinct and separate third computing system.