Visa Inc.
Crytography data management

Abstract:

A database management tool performs updates or sequential operations to large databases. A configuration file specifies source, destination (if different than source), encryption status, order, throttling limits, and number of threads to maintain, among other settings. A queue table points the tool at the database to be converted and maintains current row ID and status. The queue table may also hold the location of a hardware security module (HSM) if one is used for encryption, decryption, or hashing. The database management tool may use the configuration file to retrieve a record, perform the specified action, such as sending the record to an HSM for decryption with an old key and encryption with a new key, and replacing the old record with the updated record. The queue table may be updated with a running record of where the last operation occurred to allow rollbacks if necessary.