Voltage Security, Inc.

Entit Software LLC

Michael S Leong

Jacob Green

Terence Spies

Matthew J Pauker

Richard T Minner

Chad B Hansen

A system may include a point-of-sale system that gathers payment card track data from a payment card and a payment card gateway that processes the track data to authorize purchase transactions. The point-of-sale system may remove sensitive data such as a portion of a primary account number from the track data and may compress the removed data. The compressed version of the data may be appended to a discretionary field in the track data. The discretionary field may be encrypted following insertion of the compressed data. Track data that has been modified in this way may be conveyed to the payment gateway for processing.

System for structured encryption of payment card track data

Format-translating encryption (FTE) cryptographic operations may be implemented using a cryptographic system that translates plaintext strings to ciphertext strings of a different format and that translates ciphertext strings to plaintext strings of a different format. Plaintext strings may have a format defined by a first regular expression. Corresponding ciphertext strings may have a format defined by a second regular expression that is different than the first regular expression. During encryption operations, a format-translating encryption algorithm may employ a format-preserving encryption (FPE) encryption algorithm. During decryption operations, a format-translating encryption algorithm may employ an FPE decryption algorithm.

Format-translating encryption systems

Growing community of inventors

Redwood City, CA, United States of America

Michael S Leong