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. 14, 2005
Filed:
Jul. 10, 2000
David William Kravitz, Fairfax, VA (US);
David Moshe Goldshlag, Silver Spring, MD (US);
David William Kravitz, Fairfax, VA (US);
David Moshe Goldshlag, Silver Spring, MD (US);
Digital Video Express, L.P., Richmond, VA (US);
Abstract
The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for generating an encoded value having a first encoded value part and a second encoded value part from an unencoded value having a first unencoded value part and a second unencoded value part, comprising the steps of: obtaining an initialization vector; and generating the first and second encoded value parts. The first encoded value part is generated by: generating a first result by encrypting the first unencoded value part; generating a second result by performing an exclusive or operation on the first result and the second unencoded value part; generating a third result by performing an exclusive or operation on the second result and the initialization vector; generating a fourth result by encrypting the third result; generating a fifth result by performing an exclusive or operation on the fourth result and the first unencoded value part; and encrypting the fifth result. The second encoded value part is generated by encrypting the second result.