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:
Mar. 17, 2009
Filed:
Nov. 12, 2004
Girish R. Krishna, Torrance, CA (US);
Michael Yeung, Mission Viejo, CA (US);
Amir Shahindoust, Laguna Niguel, CA (US);
Girish R. Krishna, Torrance, CA (US);
Michael Yeung, Mission Viejo, CA (US);
Amir Shahindoust, Laguna Niguel, CA (US);
Toshiba Corporation, , JP;
Toshiba Tec Kabushiki Kaisha, , JP;
Abstract
The present invention is directed to a system and method for adding data encryption services to a document processing device. Encryption enablement software, which includes two alternate encryption mechanisms, is received by an associated document processing device. The device then awaits an associated user's selection of an electronic document file to be encrypted and subsequently encrypts the file using one of the available encryption mechanisms. The electronic document file is divided into blocks having a preselected length. An encryption key block containing first and second key portions, is then generated. The electronic data file is then encrypted using the first encryption key portion to form first level encryption data. The first level encryption data is then decrypted using the second encryption key portion to form second level encryption data. The second level encryption data is then encrypted using the first key portion to form a final encrypted electronic document file.