Patent ID: 11941591
Assignee: VISA INTERNATIONAL SERVICE ASSOCIATION
Field: IT methods for management (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A computer apparatus comprising:
a processor; and
a computer readable medium comprising code, executable by at least one processor, for implementing a method comprising:
receiving an initial authorization request message comprising a second account number, and a second expiration date or a second verification value, the second account number, and the second expiration date or the second verification value being utilized in place of a first account number, a first expiration date or a first verification value, respectively, the initial authorization request message being part of a transaction with respect to an account corresponding to the first account number, the second account number determined based at least in part on a first segment of an encrypted account number portion and a remaining portion of the first account number, the encrypted account number portion being formed at least in part by encrypting a first portion of the first account number, the first portion having less digits than the whole first account number, the remaining portion corresponding to an unencrypted portion of the first account number, the second expiration date determined based at least in part on a second segment of the encrypted account number portion, the second verification value determined based at least in part on a third segment of the encrypted account number portion;
determining the first account number, and the first expiration date or the first verification value based at least in part on the second account number, and the second expiration date or the second verification value; and
sending a modified authorization request message to an issuer, wherein the modified authorization request message comprises the first account number, and the first expiration date or the first verification value;
wherein (i) each segment of the encrypted account number portion contains less information than the whole encrypted account number portion and (ii) the first segment, and the second segment or the third segment of the encrypted account number portion form at least part of the whole encrypted account number portion.