The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2016
Filed:
Jun. 09, 2009
Clay Von Mueller, San Diego, CA (US);
Mihir Bellare, San Diego, CA (US);
Clay von Mueller, San Diego, CA (US);
Mihir Bellare, San Diego, CA (US);
VeriFone, Inc., San Jose, CA (US);
Abstract
Systems and methods for enciphering data are provided. In one embodiment, information is enciphered using a variable block length cipher that returns the encrypted symbol set in the same format as the plaintext symbol set. The cipher can be based on DES, AES or other block ciphers. In one example implementation a method for enciphering token information the invention provides for enciphering token information by constructing a tweak of a defined length using token information; converting the tweak to a bit string of a defined size to form a first parameter; converting a number of digits of plaintext to a byte string of a defined size to form a second parameter, wherein the number of digits converted varies; defining a data encryption standard key; applying the data encryption standard key to the first and second parameters; computing a specified number of encryption rounds; and receiving enciphered token information.