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:
Jan. 20, 2015
Filed:
Oct. 30, 2009
Luther W. Martin, San Jose, CA (US);
Terence Spies, Mountain View, CA (US);
Matthew J. Pauker, San Francisco, CA (US);
Luther W. Martin, San Jose, CA (US);
Terence Spies, Mountain View, CA (US);
Matthew J. Pauker, San Francisco, CA (US);
Voltage Security, Inc., Cupertino, CA (US);
Abstract
Format preserving encryption (FPE) cryptographic engines are provided for performing encryption and decryption on strings. A plaintext string may be converted to ciphertext by repeated application of a format preserving encryption cryptographic algorithm. Following each application of the format preserving cryptographic algorithm, the resulting version of the string may be analyzed to determine whether desired string constraints have been satisfied. If the string constraints have not been satisfied, further applications of the format preserving cryptographic algorithm may be performed. If the string constraints have been satisfied, the current version of the string may be used as an output for the cryptographic engine.